First, suggest moderators might consider the op has shared too much info.
But, without that info, may have never had a specific suggestion as to how to fix and what to check.
You are using a plugin for Google Oauth2 that is NOT part of core but an addon (the built in not present in version 3.2). That plugin did show the call back url you have to enter in the Google end setup. Make sure that callback url is correct on the Google end.
Note the lines above that show values for variables ... see the client id= has a 'space' before the ID number.
So in your Moodle config, check the setup of both the key and the secret. Hard to see but there could be a space at the beginning of both the secret and the key ... as well as a space at the end of each of those.
Remove the spaces at beginning and at end of both secret and key then save. Then logout and TIA (try it again).
Also, your server is behind 'CloudFlare'. Is there any setting you might need to change in your setup of CloudFlare? Can't help ya with that one.
'spirit of sharing', Ken