Windows Central published a guide showing you the steps to overcome the problems due to the PrintNightmare update and workarounds on Windows 10. 

The Windows 10 PrintNightmare update is causing issues, but here's the fix

Microsoft is having problems patching the PrintNightmare vulnerability, but these tips should help overcome the issues on Windows 10. Although Microsoft has quickly released an out-of-band update to fix the PrintNightmare vulnerability on Windows 10 and older versions of the OS, it appears that the rollout is causing additional unwanted issues among users. Shortly after releasing update KB5004945, a small number of users began to report that their printer stopped working after applying the patch. Although this has been affecting mainly Zebra printers, the problem is also affecting other brands. 

The Windows 10 PrintNightmare update is causing issues, but here's the fix