bug

Hello,
I just installed this plug on my theme, but an error message appears when I choose a form, can you help me please? Thank you very much

Here is the error message:

“DataTables warning: table id = nimble_table_data – An error occurred while connecting to the database. The error reported by the server was: SQLSTATE [HY000] [2005] Unknown MySQL server host ‘aquamotiob16.mysql.db: 3306′”