Build error for my projects

For the past few days, I have been unable to compile any projects.

I keep getting the error message:

Build failed! Build server responded with response code 500.

Server Error (500)

Server Error (500)

mvg

Which server?

ai2a or code2 ?

This is because you are on legacy.appinventor.mit.edu (the old AI2), which no longer has a buildserver. Your account failed to migrate to our new infrastructure (ai2a) back in August. I have reset things, so the next time you login, the system will attempt the migration again. If it is successful, and it should be this time, your account will be on the new infrastructure, and everything should work.

-Jeff