Can't Post Revit Project File to Community

[Anonymous]

I keep getting this error when trying to post a project file to the community (less than 3mb):

Correct the highlighted errors and try again.

• The attachment's Pattern Based Prob_Proj.rvt content type (unknown/unknown) does not match its file extension and has been removed

Can someone please help? This is really frustrating. It's a baby sized file so I expect there be zero issues here.

Thanks.

[L.Maas]

Using Firefox? Try different browser, like Internet explorer. This might sometimes help.

Also browser add-ins (like the different blockers) might prevent it from properly working.

As a 'last resort' you can also try to zip your file or use a different service like wetransfer/dropbox and post the link.

(If I am correct the attachment limit is recently increased fro 5 to 75 MB)