Heads up: If you are running this game through the Windows Task Bar (At one point you pinned the mtga.exe to the task bar for quicker access), I found a fix. If you unpin the executable, you can press Windows and search "MTGA" and run it through there. When you do that, it will also run the necessary scripts for updating the client, validation, etc. When MTGA.exe is able to run those update checks and what not the issue will resolve.
BenSamson#65095
Heads up: If you are running this game through the Windows Task Bar (At one point you pinned the mtga.exe to the task bar for quicker access), I found a fix. If you unpin the executable, you can press Windows and search "MTGA" and run it through there. When you do that, it will also run the necessary scripts for updating the client, validation, etc. When MTGA.exe is able to run those update checks and what not the issue will resolve.