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PDF Export Unknown Error (possibly linked to copy+paste tables #1087

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opened 2026-02-04 23:43:03 +03:00 by OVERLORD · 1 comment
OVERLORD commented 2026-02-04 23:43:03 +03:00
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Originally created by @Ethanb00 on GitHub (Mar 13, 2019).

Describe the bug
Hey mate.

I was working up some documentation where I was copying and pasting content from the Salesforce Setup/Admin section (basically, tables of permissions, see below). They copy and paste ok, but when I go to export to PDF, it throws the "An unknown error occurred" message.

Many thanks,
Ethan

Steps To Reproduce
Steps to reproduce the behavior:

  1. Using Salesforce Setup/Admin section, copy and paste a value/checkbox table into Bookstack
  2. Clean up table sizing for aesthetics.
  3. Save the page
  4. Export to PDF
  5. See error

I reviewed some of the previously reported PDF issues and the suggested composer install + cache clears didn't help. I think it's pretty unlikely to be the issue. Other pages export to PDF just fine.
Expected behavior
A PDF export

Screenshots
image

image

Your Configuration (please complete the following information):

  • Exact BookStack Version (Found in settings): BookStack v0.25.1
  • PHP Version: PHP 7.0.33-0ubuntu0.16.04.2
  • Hosting Method (Nginx/Apache/Docker): Apache

Additional context
Laravel.log:

Details 

 production.ERROR: Call to a member function get_cellmap() on null {"userId":1,"email":"[REDACTED]","exception":"[object] (Symfony\\Component\\Debug\\Exception\\FatalThrowableError(code: 0): Call to a member $
[stacktrace]
#0 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\TableCell->reflow(NULL)
#1 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/TableRow.php(52): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow()
#2 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\TableRow->reflow(Object(Dompdf\\FrameDecorator\\Block))
#3 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block))
#4 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block))
#5 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block))
#6 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block))
#7 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block))
#8 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block))
#9 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block))
#10 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block))
#11 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block))
#12 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block))
#13 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block))
#14 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block))
#15 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block))
#16 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block))
#17 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block))
#18 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(NULL)
#19 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Page.php(141): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow()
#20 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Page->reflow(NULL)
#21 /var/www/bookstack/vendor/dompdf/dompdf/src/Dompdf.php(847): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow()
#22 /var/www/bookstack/vendor/barryvdh/laravel-dompdf/src/PDF.php(200): Dompdf\\Dompdf->render()
#23 /var/www/bookstack/vendor/barryvdh/laravel-dompdf/src/PDF.php(146): Barryvdh\\DomPDF\\PDF->render()
#24 /var/www/bookstack/app/Entities/ExportService.php(140): Barryvdh\\DomPDF\\PDF->output()
#25 /var/www/bookstack/app/Entities/ExportService.php(86): BookStack\\Entities\\ExportService->htmlToPdf('<!doctype html>...')
#26 /var/www/bookstack/app/Http/Controllers/PageController.php(504): BookStack\\Entities\\ExportService->pageToPdf(Object(BookStack\\Entities\\Page))

Originally created by @Ethanb00 on GitHub (Mar 13, 2019). **Describe the bug** Hey mate. I was working up some documentation where I was copying and pasting content from the Salesforce Setup/Admin section (basically, tables of permissions, see below). They copy and paste ok, but when I go to export to PDF, it throws the "An unknown error occurred" message. Many thanks, Ethan **Steps To Reproduce** Steps to reproduce the behavior: 1. Using Salesforce Setup/Admin section, copy and paste a value/checkbox table into Bookstack 2. Clean up table sizing for aesthetics. 3. Save the page 4. Export to PDF 5. See error I reviewed some of the previously reported PDF issues and the suggested composer install + cache clears didn't help. I think it's pretty unlikely to be the issue. Other pages export to PDF just fine. **Expected behavior** A PDF export **Screenshots** ![image](https://user-images.githubusercontent.com/5893479/54287299-c599dd80-457b-11e9-8c36-7f73e7486e59.png) ![image](https://user-images.githubusercontent.com/5893479/54286849-f9283800-457a-11e9-865a-c7ac15984c77.png) **Your Configuration (please complete the following information):** - Exact BookStack Version (Found in settings): BookStack v0.25.1 - PHP Version: PHP 7.0.33-0ubuntu0.16.04.2 - Hosting Method (Nginx/Apache/Docker): Apache **Additional context** Laravel.log: <details><summary>Details</summary> <p> ``` production.ERROR: Call to a member function get_cellmap() on null {"userId":1,"email":"[REDACTED]","exception":"[object] (Symfony\\Component\\Debug\\Exception\\FatalThrowableError(code: 0): Call to a member $ [stacktrace] #0 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\TableCell->reflow(NULL) #1 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/TableRow.php(52): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow() #2 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\TableRow->reflow(Object(Dompdf\\FrameDecorator\\Block)) #3 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block)) #4 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block)) #5 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block)) #6 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block)) #7 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block)) #8 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block)) #9 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block)) #10 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block)) #11 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block)) #12 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block)) #13 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block)) #14 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block)) #15 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block)) #16 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(Object(Dompdf\\FrameDecorator\\Block)) #17 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Block.php(845): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow(Object(Dompdf\\FrameDecorator\\Block)) #18 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Block->reflow(NULL) #19 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameReflower/Page.php(141): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow() #20 /var/www/bookstack/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php(895): Dompdf\\FrameReflower\\Page->reflow(NULL) #21 /var/www/bookstack/vendor/dompdf/dompdf/src/Dompdf.php(847): Dompdf\\FrameDecorator\\AbstractFrameDecorator->reflow() #22 /var/www/bookstack/vendor/barryvdh/laravel-dompdf/src/PDF.php(200): Dompdf\\Dompdf->render() #23 /var/www/bookstack/vendor/barryvdh/laravel-dompdf/src/PDF.php(146): Barryvdh\\DomPDF\\PDF->render() #24 /var/www/bookstack/app/Entities/ExportService.php(140): Barryvdh\\DomPDF\\PDF->output() #25 /var/www/bookstack/app/Entities/ExportService.php(86): BookStack\\Entities\\ExportService->htmlToPdf('<!doctype html>...') #26 /var/www/bookstack/app/Http/Controllers/PageController.php(504): BookStack\\Entities\\ExportService->pageToPdf(Object(BookStack\\Entities\\Page)) ``` </p> </details>
OVERLORD added the 🐛 Bug🏭 Back-End🔍 Pending Validation🚚 Export System labels 2026-02-04 23:43:03 +03:00
OVERLORD commented 2026-02-04 23:43:11 +03:00
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@ssddanbrown commented on GitHub (Sep 7, 2025):

Hi @Ethanb00,
Sorry, forgot to come back to properly validate & dig into this one!

Since this is so old I'm going to close it off, but feel free to raise a new issue if it's still a problem for you on the latest version.

@ssddanbrown commented on GitHub (Sep 7, 2025): Hi @Ethanb00, Sorry, forgot to come back to properly validate & dig into this one! Since this is so old I'm going to close it off, but feel free to raise a new issue if it's still a problem for you on the latest version.
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