Error opening workspace: Internal error encountered in Project IDX

please help me fix this problem, when I’m coding suddenly it exits and an error like this appears
it can still be opened for a new one, but all my coding content is here

@keykey520 - please file a bug with the name of your workspace ID that is throwing the error: http://issuetracker.google.com/issues/new?component=1379083&template=1836320

Thanks,
Kirupa