When tapping My Files and selecting Google Drive in the left pane, your files appear by are dimmed out and won’t open.
This is an issue with the Google Drive service itself.
There are many ways to upload a file to Google Drive. Depending on the method used, Google Drive may classify a Clicker file as a different type. This causes the file to appear dimmed and unopenable in our apps.
We've updated our software to reduce the chances of this happening. However, older files may still be affected.
To open a file that appears dimmed out in My Files, use the Google Drive app instead:
Files uploaded by Google Drive for Desktop (formally Drive File Stream) aren't affected by this issue.
Therefore, if you're not already using it, consider using Google Drive for Desktop as a sync solution within your organisation.
To learn more, see:
https://support.google.com/a/answer/7491633