when trying to connect to the database from the server
https://b2bhub.crm-onebox.com/ we get the error ERROR 2002 (HY000): Can't connect to MySQL server on '185.181.165.238' (115)
Most likely, on the database server side, access is not open under the database access specified in the integration, and therefore we cannot connect.
I recommend contacting the system administrator who maintains that server so that he can make working access with which there will be access to the database from the server
https://b2bhub.crm-onebox.com/