Error when trying to save a diagram - drawing manager keeps loading #4472

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OVERLORD · 2026-02-05T08:57:24+03:00

OVERLORD commented

2026-02-05 08:57:24 +03:00

Originally created by @lvg-cm on GitHub (Feb 19, 2024).

Attempted Debugging

I have read the debugging page

Searched GitHub Issues

I have searched GitHub for the issue.

Describe the Scenario

Create a new page, add a diagram, add e.g. a circle to the diagram and then click save.
Error is displayed: An error occured uploading the image.
When I open dev-tools, it shows me the following errors:

On the filesystem I cannot find any diagram in ...\bookstack\public\uploads

When I try again to create a diagram, I get the question Unsaved drawing data was found from a previous failed drawing save attempt. Would you like to restore and continue editing this unsaved drawing?
If I click continue, it does show the previously created diagram.

Secondly, if I open the diagram manager, it keeps loading.
When I open dev-tools, it shows me the following errors:

Adding and selecting images does seem to work:

I can open the image gallery and it will show me all added images.
When double clicking on an image, it will get added to the page (there is no "Select image" button though.)

However, if I open dev-tools in my browser, it will also show errors:

On the filesystem I do find the uploaded images in ...\bookstack\public\uploads\images\gallery\2024-02

Exact BookStack Version

v23.12.1

Log Content

No error written to the laravel logfile

Hosting Environment

Windows Server 2022 Standard Edition (21H2)
IIS 10.0.20348.1
PHP Manager - PHP 8.3.2
MySQL Community Edition 8.0.32

Originally created by @lvg-cm on GitHub (Feb 19, 2024). ### Attempted Debugging - [X] I have read the debugging page ### Searched GitHub Issues - [X] I have searched GitHub for the issue. ### Describe the Scenario Create a new page, add a diagram, add e.g. a circle to the diagram and then click save. Error is displayed: An error occured uploading the image. When I open dev-tools, it shows me the following errors: ![image](https://github.com/BookStackApp/BookStack/assets/160477390/640bb506-7fb9-4482-a0ab-de07b9534434) On the filesystem I cannot find any diagram in ...\bookstack\public\uploads When I try again to create a diagram, I get the question _Unsaved drawing data was found from a previous failed drawing save attempt. Would you like to restore and continue editing this unsaved drawing?_ If I click continue, it does show the previously created diagram. Secondly, if I open the diagram manager, it keeps loading. When I open dev-tools, it shows me the following errors: ![image](https://github.com/BookStackApp/BookStack/assets/160477390/335cec22-d05f-4ddc-a700-61f85a53ab38) Adding and selecting images does seem to work: - I can open the image gallery and it will show me all added images. - When double clicking on an image, it will get added to the page (there is no "Select image" button though.) However, if I open dev-tools in my browser, it will also show errors: ![image](https://github.com/BookStackApp/BookStack/assets/160477390/75274903-1dc9-445f-a74e-fe72cadd17ef) On the filesystem I do find the uploaded images in ...\bookstack\public\uploads\images\gallery\2024-02 ### Exact BookStack Version v23.12.1 ### Log Content No error written to the laravel logfile ### Hosting Environment Windows Server 2022 Standard Edition (21H2) IIS 10.0.20348.1 PHP Manager - PHP 8.3.2 MySQL Community Edition 8.0.32

OVERLORD added the 🐕 Support label 2026-02-05 08:57:24 +03:00

OVERLORD closed this issue

2026-02-05 08:57:27 +03:00

OVERLORD commented

2026-02-05 08:57:31 +03:00

@lvg-cm commented on GitHub (Feb 19, 2024):

I wonder if it has something to do with the url rewriting rules I used (got them from https://www.reddit.com/r/BookStack/comments/yqvg64/installing_bookstack_on_iis_10_windows_server_2016/)

Here is the bookstack web.config:

<configuration>
  <system.webServer>
	<rewrite>
		<rewriteMaps>
				<rewriteMap name="{REQUEST_FILENAME}" />
		</rewriteMaps>
		<rules>
					<clear />
					<rule name="Rule 1" enabled="true" stopProcessing="true">
						<match url="^(.*)$" />
						<conditions logicalGrouping="MatchAll" trackAllCaptures="false">
							<add input="{R:1}" matchType="Pattern" pattern="^(index\.php|images|css|js|favicon\.ico)" ignoreCase="true" negate="true" />
							<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
							<add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
						</conditions>
						<action type="Rewrite" url="./index.php/{R:1}" />
					</rule>
					<rule name="Rule 2" enabled="true" stopProcessing="true">
						<match url="^$" />
						<conditions logicalGrouping="MatchAll" trackAllCaptures="false">
							<add input="{URL}" pattern="(.*/bookstack)$" />
						</conditions>
						<action type="Redirect" url="index.php" />
					</rule>
					<rule name="Rule 2bis" enabled="true" stopProcessing="true">
						<match url="(^/*)(.*$)" />
						<conditions logicalGrouping="MatchAll" trackAllCaptures="false">
							<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
							<add input="{URL}" pattern="(\/images\/gallery)(.*)" />
						</conditions>
						<action type="Rewrite" appendQueryString="true" url="index.php/uploads{C:0}" />
					</rule>
					<rule name="Rule 3" enabled="true" stopProcessing="true">
						<match url="(^/*)(.*$)" ignoreCase="false" />
						<conditions logicalGrouping="MatchAll" trackAllCaptures="false">
							<add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
							<add input="{R:0}" pattern="(index\\.php|images|css|js|favicon\\.ico)" negate="true" />
						</conditions>
						<action type="Rewrite" url="index.php/{R:1}" />
					</rule>
		</rules>
		</rewrite>
		<directoryBrowse enabled="false" />
		<defaultDocument enabled="false">
			<files>
				<add value="index.php" />
				<add value="index" />
			</files>
		</defaultDocument>
	</system.webServer>
</configuration>

@lvg-cm commented on GitHub (Feb 19, 2024): I wonder if it has something to do with the url rewriting rules I used (got them from https://www.reddit.com/r/BookStack/comments/yqvg64/installing_bookstack_on_iis_10_windows_server_2016/) Here is the bookstack web.config: ``` <configuration> <system.webServer> <rewrite> <rewriteMaps> <rewriteMap name="{REQUEST_FILENAME}" /> </rewriteMaps> <rules> <clear /> <rule name="Rule 1" enabled="true" stopProcessing="true"> <match url="^(.*)$" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{R:1}" matchType="Pattern" pattern="^(index\.php|images|css|js|favicon\.ico)" ignoreCase="true" negate="true" /> <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" /> <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" /> </conditions> <action type="Rewrite" url="./index.php/{R:1}" /> </rule> <rule name="Rule 2" enabled="true" stopProcessing="true"> <match url="^$" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{URL}" pattern="(.*/bookstack)$" /> </conditions> <action type="Redirect" url="index.php" /> </rule> <rule name="Rule 2bis" enabled="true" stopProcessing="true"> <match url="(^/*)(.*$)" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" /> <add input="{URL}" pattern="(\/images\/gallery)(.*)" /> </conditions> <action type="Rewrite" appendQueryString="true" url="index.php/uploads{C:0}" /> </rule> <rule name="Rule 3" enabled="true" stopProcessing="true"> <match url="(^/*)(.*$)" ignoreCase="false" /> <conditions logicalGrouping="MatchAll" trackAllCaptures="false"> <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" /> <add input="{R:0}" pattern="(index\\.php|images|css|js|favicon\\.ico)" negate="true" /> </conditions> <action type="Rewrite" url="index.php/{R:1}" /> </rule> </rules> </rewrite> <directoryBrowse enabled="false" /> <defaultDocument enabled="false"> <files> <add value="index.php" /> <add value="index" /> </files> </defaultDocument> </system.webServer> </configuration> ```

OVERLORD commented

2026-02-05 08:57:34 +03:00

@ssddanbrown commented on GitHub (Feb 19, 2024):

Do you need to use those rewrite rules? The linked reddit post was from someone using BookStack on a sub-path/folder which can complicate things, whereas (AFAICT) you're just on a domain/subdomain which is simpler.

BookStack does provide some of its own simpler rules: https://github.com/BookStackApp/BookStack/blob/development/public/web.config

Although to be honest these aren't really tested in regard to BookStack, since we don't have IIS testing environments.

@ssddanbrown commented on GitHub (Feb 19, 2024): Do you need to use those rewrite rules? The linked reddit post was from someone using BookStack on a sub-path/folder which can complicate things, whereas (AFAICT) you're just on a domain/subdomain which is simpler. BookStack does provide some of its own simpler rules: https://github.com/BookStackApp/BookStack/blob/development/public/web.config Although to be honest these aren't really tested in regard to BookStack, since we don't have IIS testing environments.

OVERLORD commented

2026-02-05 08:57:36 +03:00

@lvg-cm commented on GitHub (Feb 19, 2024):

Hi, thx for pointing me back to it. I did try it and at first the original web.config didn't work. Then I tried all steps from the reddit post, which made pages and images available.

I have now put back the original web.config file again and everything seems to work fine now. Most error messages are gone as well in dev-tools.
Thanks a lot!

@lvg-cm commented on GitHub (Feb 19, 2024): Hi, thx for pointing me back to it. I did try it and at first the original web.config didn't work. Then I tried all steps from the reddit post, which made pages and images available. I have now put back the original web.config file again and everything seems to work fine now. Most error messages are gone as well in dev-tools. Thanks a lot!

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Reference: starred/BookStack#4472