HP Officejet Pro L7550 - Error messages appear

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Error messages appear

"Unable to activate TWAIN source" or "An error occurred while acquiring the

If you are acquiring an image from another device, such as a digital camera or
another scanner, make sure that the other device is TWAIN-compliant. Devices
that are not TWAIN-compliant do not work with the device software.

Make sure that you have connected the USB Device Cable to the correct port
on the back of your computer.

Verify that the correct TWAIN source is selected. In the software, check the
TWAIN source by selecting Select Scanner on the File menu.

“Reload document and then restart job”
Press the OK button, and then reload the remaining documents (up to 50 pages)
in the ADF. For more information see

Load media