Ok, about the first (MVAM) it would appear there are files in scripts/Custom/Autoload/Mvam/ that are not py or pyc files, try moving them to somewhere else (create a directory in scripts/Custom/Autoload/ called, say, MvamBackup and move them in there).
About the second (actually an old mod of mine, didn't know it was still included), not sure why that is happening. It's, as far as I know, impossible for that to happen.
But fixing the first could "fix" the second as well.