[Snapshot Pro] Website Snapshot Backup Failure

I have a website and Snapshot Pro on it for backup.
I have two problems:
1. Snapshot ZIP file creation fails on ../plugins directory. /plugins directory is 159 MB big and has 13132 files. Snapshot ALWAYS fail on this directory. Without the setting "Include all Plugins" it creates and uploads ZIP just fine. With /plugins included it fails with error message you can find attached.
2. Why doesn't Snapshot Pro give me some heads up when Snapshot or Backup fails? Some email would be fine.
Thank you.