An internal error occurred during: "Updating local SCM
3 answers
It looks like your local metadata has become corrupt. You could try running Repair Metadata which is an action available from the Team/Jazz Source Control preference page.
This also fixed a similar error that occurred when I tried to unload a Repository Workspace:
An internal error occurred during: "Unloading repository workspaces".
The forward and inverse maps must agree for /.../.../.../.../xx.xsd
Thank you!