Errors while creating C++ project

Hello!
Can you tell me how to fix these problems please?
https://forums.unrealengine.com/development-discussion/c-gameplay-programming/1876864-errors-while-creating-c-project

Your engine installation could be corrupted.
I would try to uninstall, cleanup the system and reinstall it again.

I tried this on UE 4.22. There was the same error. Then I reinstalled engine, vesrsion 4.26.1. Same error(
What do you mean by “cleanup the system”?
Thanks!