Businessomatic Exception: No valid access token found

Hello, I installed the plugin according to the instructions, I also have access to the Business API on Google but I always get an error in Wordpress. I am not able to authorize the plugin, what am I doing wrong? The log looks like this: [14-Jan-2022 17:02:10 UTC] Exception thrown in Google My Business Auth auth stage 2: { "error": { "code": 404, "message": "Method not found.", "errors": [ { "message": "Method not found.", "domain": "global", "reason": "notFound" } ], "status": "NOT_FOUND" } } [14-Jan-2022 17:02:11 UTC] No valid access token found: [14-Jan-2022 17:02:11 UTC] Exception thrown in Google My Business Auth auth stage 2: No access token found.