The error 0x8007007e is a windows error and it can occur due to several reasons like deleted or corrupted system files associated with the printer, viruses or other malicious software, and misplaced PrintConfig.dll file. First, you should check these causes and then proceed to fix the error. There are several ways by which you can resolve this error.
By using a different browser
By updating your printer device driver
By updating Windows 10
By copying "PrintConfig.dll" file to correct folder