Godot version:
3.2.2
(3.2.3 - I tried it with 3.2.3 version there was the same happening)
OS/device including version:
MX Linux - always updated
Intel i5-2520M
Issue description:
Today my project broke. When I started it, I couldn't use the editor normally - couldn't scroll to zoom in in the 2D view, the layout was weird, when I clicked on stuff it didn't work everytime (like there were no nodes shown, when I tried it).
When I opened other projects everything worked flawlessly.
I could fix it though with just copying the folder of the project to another place and/or renaming the folder (Decide to Decide4) in which the project is located and reimported. When I renamed the folder back and put it in the previous location it stopped working again.
Restarting didn't change anything.

Terminal:
Error
ErrorMessage.txt
When everything is fine
NormalMessage.txt
Unfortunately, without a minimal reproduction project, this will most likely be impossible to troubleshoot.
I would really love to do that, but since the project works when I put it in another folder this is hard to replicate. Is there anything else I could do?
@Daniel-da-Silva In this case, I don't think so :shrug:
We may close this issue if nobody manages to reproduce it in a few weeks' time. In the meantime, I suggest setting up version control like Git to avoid losing your project data due to mistakes or bugs.
Also, just in case, you can try resetting your editor settings by removing your Godot user data folder while the editor is closed: https://docs.godotengine.org/en/latest/tutorials/io/data_paths.html
(Your Godot user data folder contains configuration files, export templates, project-specific configuration but not the project files themselves.)
I started it with the Terminal - maybe this is useful in any way (it's fucking long). When I start another project this doesn't happen
Error
Normal
And thanks for the advice! - I always put my older project files on a USB stick and the SSD but I should use git or something.
Backup your Cache, Kill it, see if that fixes it, then put back the Cache if it does to see if it'll break it.
Note: By Cache I mean the "Project Name - randomnumbers/letters" in Appdata for Godot under Projects
I could fix it though with just copying the folder of the project to another place and/or renaming the folder (Decide to Decide4) in which the project is located and reimported. When I renamed the folder back and put it in the previous location it stopped working again.
Based on this, I'm 99% sure it's just the config(aka cache like mrjustaguy said) for the project that is messed up.
On Linux, this is ~/.local/share/godot/app_userdata/[project_name], or ~/.local/share/[custom_name] if use_custom_user_dir is set.
Update: Check Akien's comment below.
Try deleting or renaming that folder.
Unfortunately this didn't change anything :/ I cut and pasted it on a USB stick and removed it. The problem is still there. Removing didn't help and putting it back also didn't. Thanks for posting the path, I use Linux for a short amount of time as my main machine.
On Linux, this is
~/.local/share/godot/app_userdata/[project_name], or~/.local/share/[custom_name]ifuse_custom_user_diris set.
Those are the paths for the user:// filesystem, not the project metadata. Project metadata on Linux is in ~/.config/godot/projects/<name>-<hash>/.
I will test this in a couple of days! Thanks!
Hey guys, I just tested it and cut the folder completely and put it in the download section. Didn't change anything, the problem still was there (and is still fixed by the same method).
Was the project or editor open when you moved/deleted the .config folder? You need to have it closed.
Most helpful comment
Those are the paths for the
user://filesystem, not the project metadata. Project metadata on Linux is in~/.config/godot/projects/<name>-<hash>/.