Bookstack: Cannot upload Images

[spacesven]

Describe the bug
If you try to upload an Image in any way (Profile Picture, Book Cover or Page-Image) it gets the message "an unknown error occurred"

Steps To Reproduce
Steps to reproduce the behavior:

1. Go to 'Edit Profile'
2. Click on 'Upload Image'
3. Select Image
4. Click on 'Save'
   ^5. Error Occurrs

Expected behavior
Image should be saved/inserted without error

Screenshots
https://i.imgur.com/EmEr6km.png
https://i.imgur.com/GFEjCBz.png

Your Configuration (please complete the following information):

• Exact BookStack Version (Found in settings): v0.30.2
• PHP Version: 7.2.19
• Hosting Method (Nginx/Apache/Docker): IIS 10 (Windows Server 2019)
• Composer 1.9.2

Additional context
Laravel Log-File:
laravel.log

[ssddanbrown]

Hi @spacesven,
Sorry you're seeing issues.

So the error being logged is file_get_contents(): Filename cannot be empty.
From what I've seen, On IIS this is generally due to folder permissions, potentially for the system Temp folder.

It's worth reading through #137 as I believe that details the same issue. In particular the info in this comment may help: https://github.com/BookStackApp/BookStack/issues/137#issuecomment-306751862

I don't run IIS myself though so can't be sure.

[SayHeyD]

Hey I'm a co-worker of @spacesven. Thanks to your response we were able to resolve the Problem, we thought we changed the PHP-Temp upload directory to a Path where our custom User had access to, but it turns out that this configuration didn't get saved or applied properly. The Issue you linked provided the complete solution of our Problem. Thanks.

[ssddanbrown]

@SayHeyD Awesome, Thanks for confirming that worked, glad to hear things are working now. Will therefore close this off.