Token endpoint gives error when using cryptotokens (D8)

I was able to work around this error:

Uncaught PHP Exception Drupal\\Core\\Entity\\EntityStorageException: "SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column 'token' at row 1: INSERT INTO "oauth2_server_token" ("client_id", "uid", "type", "token", 

By modifying the oaht2_server_token table - change the "token" column to type=text
That'll allow for a longer token value and not throw the exception

However, I'm still getting this error after fixing it:
bad_signature
invalid_token

Any help would be appreciated

The change proposed in #2 still is in the Drupal 7 version of the module. I don't get why it shouldn't be in the D8+ one. The problem encountered in #3 may have another cause.