For connected printers :
You can Disable the Malwarebytes
For wireless printers:
First, disable the web protection component and then try to use the scanner. But you only need to disable the web protection tool while doing a scan. Once you have completed your work, enable the web protection feature to keep your device safe.
If you are still not able to fix Malwarebytes exploit blocks hp printer, then do visit website, get Malwarebytes customer support number and connect Malwarebytes service