Hmm, it sounds like you're unable to interact with the team repository at all. Is this a team project that is hosted on Axure Share, or is it an SVN team project (hosted on either an SVN server or network drive)?
Which build of Axure RP 8 are you currently using? Are any of your team members who are using the same team project experiencing similar issues? Do you see the same error with other team projects, or does the issue seem specific to this file?
If you haven't already, please try giving the steps in our troubleshooting guide a try to see if these help:
If you continue to encounter errors, then please send over a zipped copy of your Axure "logs" folder (C:\Users\%USERNAME%\AppData\Local\Temp\Axure-8-0\logs) to email@example.com so that we can take a look at the error_log and post_log files that may be getting generated when your team project errors.