If you want to fix the “hosting mode is off problem of QB”, then you must keep these things in mind. 

• You should have the most recent version of Quickbooks Software in your device with all the major updates done.

• Install the Quickbooks Database Server Manager before starting the troubleshooting process. 

• Don’t forget to have a look at the prerequisites before doing the troubleshooting process.

• Keep the version of the server manager and Quickbooks Desktop same.