Recent updates to MTGA changed how player data is identified in the game logs, breaking several third-party tools. Check for v3.11+ Updates
The text "comdatagamerar" is almost certainly a glitched version of . This usually happens when a file extension is renamed incorrectly, a download is interrupted, or software attempts to read a file name that has had its .rar extension stripped or altered. comdatagamerar fix
Before you run the installer again: