Connection failure

Installed in site 1 - Connected fine.
Installed on site 2 & 3 - Connection wizard yields this

{“errors”:[{“challenge_metadata”:null,“code”:3,“code_name”:“ParameterInvalid”,“detail”:“Invalid parameter for ‘oauth_client_id’: 7800.”,“id”:“1092ced7-ece9-5372-8e13-cf2bbb35a014”,“source”:{“parameter”:“oauth_client_id”},“status”:“400”,“title”:“Invalid value for parameter ‘oauth_client_id’.”}]}

Yes, this is because the connection wizard does not support connecting more than 1 site through the api yet. You will need to create apps for the other two sites in the below page and c/p their details to WP admin → Patreon Settings → Connection details.