www.makemkv.com

Looking for advice when ripping a couple DVD's!
Any help would be appreciated. Just a Bad / Scratched disc? Or something else?
Thank You!
Here is the console output:

Beginning to backup DVD: SOLO
MakeMKV v1.14.3 linux(x64-release) started
Failed to open disc

Turn on Debug Logging (link in my signature tells you how) and see if there is more information available.

There is a topic at the top of the Bluray section that deals with common causes for ripping errors.