Windows Central published a guide about troubleshoot your Windows 10 May 2020 Update installation.
The ultimate guide to fixing problems with the May 2020 Update
Are you installing the Windows 10 May 2020 Update (version 2004) on your computer? If you're having problems, in this guide, we'll help you to troubleshoot and fix them all.
The ultimate guide to fixing problems with the May 2020 Update