Have you encountered an error "Motion Graphic template is corrupt"? You're at the right place.
It seems that Premiere Pro might have a problem with deeply nested folders or too long folder names. For example:
D:\Projects\Folder\Folder....\Folder\Auto Save\Auto Save\Folder\
The issue is related to operating system limits on the total length of a file path. Windows might be setup in a way to allow only certain length and then a program might fail in retrieving the file.
1. Possible solution
By default all graphic files are copied next to your project file. If your project file is nested too deep in the folder structure Premiere Pro might be unable to reach for the imported file and reports it as corrupted.
How to fix? Try to copy your project a few folders above the current folder it is in. Or you may shorten some folder names if they are too long.
2. Possible solution
Navigate to File -> Project Settings -> Scratch Disks. Then make sure the "Motion Graphics Template Media" path is set to "Same as project". Then make sure your projects are not too deeply nested in folder structure as explained in 1. solution above.