@Random.Name had the same issue you did after the update. I was able to get it working by generating the ovpn file with rsa4096/AES-256-GCM settings. I was not able to get any of the other configs to work.
Having issues with assigning a static address to minecraft container. Bridge mode works fine but static seams to have issues with the ports. Not seeing errors in the logs either.
I had these errors as well when upgrading to 6.4.1. I have a X11SSM-F Supermicro motherboard but like you I was running the 2.0a BIOS version. After upgrading to 2.0c I have had no errors at all and my shares have stayed online.