After upgrade to 5.5.2 Animations are imported but are not editable & lot's of errors

Hello,

I’ve upgraded to unity 5.5.2 yesterday and upon opening the project, there is a problem with animations on all imported models in the project window. Whenever I go into “animations” tab, I get several console errors, attached on the image below.

As you can see, None of the usual settings for creating animation clips are possible and are simply missing from the panel.

The whole animation clip is still previewable if the imported prefab object is unfolded and the Take001 is selected directly. I can see the model moving in the preview window. Animations also work inside animator.

It’s just that I can’t split it into smaller clips.

Re-importing the entire project didn’t help, here is the 2nd debug.log:

The files are .fbx and worked totally fine with 5.5.0

@DavidGeoffroy
@Mecanim-Dev

Thanks!

My appologies, it was due to a buggy plugin (which used a lot of OnPreviewGUI() calls along with Reflection.

After deleting the plugin, re-import all, re-start unity it works like a charm.