I’ve experienced same issue. I’ve uploaded about 200MB across 13 files, first run response from assistant when starting a thread says some version of:
It seems that there was an issue with the uploaded files, as they are not accessible through the system tool designed for browsing their contents.
I see that you have uploaded a large number of files, but it seems there is a technical issue preventing me from accessing them using the myfiles_browser tool that would allow me to look inside the contents.
Would be helpful to hear from the team on any work-arounds for this