I am getting this problem in 5.3.1

I removed the TextMeshPro directory and it loads fine
As I soon as i reimport, it crashes again!

I have been using the same setup for months and now it suddenly broke my project!
What is the fix?

I forgot to post this here, I forwarded this ticket to someone on the QA team, and they responded with the following:

'About the other issue: I have reached out to the developers and they assured me that this issue will be fixed. Right now its milestone is set to 5.4.1 so you should be looking forward to that.'

I am getting this problem when I have an open scene that contains a TextMeshPro text object.

1. Build project.
2. Make a change to a TextMeshPro material (sub-object of multi-object asset).
3. File | Save
4. Unity freezes.
5. Task Manager > Kill unity.exe Process
6. Open Unity
7. Unity displays error "Opening file failed Opening file {ProjectPath}/sharedassets0.assets.resS: No such file or directory"
8. Click 'Cancel' command a few times until project loads.
9. Attempt to open scene that contains the TextMeshPro object and Unity instantly freezes again.
10. Task Manager > Kill unity.exe Process
11. Navigate to the TextMeshPro multi-object asset file; and delete it (using File Explorer).
12. Open Unity and the scene that contains the TextMeshPro object... okay missing font reference, but the scene opens again.
13. Re-create font asset.
14. go back to step 1 and the whole cycle starts over.

I was having a very similar problem problem for the past few days except this was during the asset import process, not when trying to opening a scene. I am using Unity 5.4.0p3 for OSX.

Prior to the 'Cancelling DisplayDialog...' message in my log, it was attempting to import a prefab from a plugin that I am using, TextMesh Pro. I noticed before that git was showing that the prefab had been modified after I imported the package from the Asset Store, even though nothing was done to it. We committed this to git accidentally, and any fresh version of the repo would no longer import... it would hang at Importing Small Assets and then we would see the message in the Log.

The solution for my case was to remove the plugin prior to the import process and reimport it from the Asset Store. I don't know why the engine is altering the prefab on import.

Hopefully this helps you narrow down the problem, it's been a major headache trying to figure this one out.

Just wondering if there has been a solution found for this?

Same error here, on a Mac, version 5.4.0f3.

(Filename: /Users/builduser/buildslave/unity/build/Editor/Platform/OSX/EditorUtility.mm Line: 798)

Force Quit pressed for Opening file failed: Opening file /Users/brice/Cloud/Dropbox/Code/Workspaces/Unity/U1/resources.assets.resS: No such file or directory

Could it be linked to Dropbox sync working in background?

I have this problem also when loading from asset bundles. This is a serious issue as we can't release our client's otherwise ready app. Has anyone found any resolution?

Same as Iceman, same version as well. I can't seem to do anything now.

I have this problem while loading assets from asset bundles in 5.3.5f1.

I have a similar problem. How did you solve it?