start menu – All window icons are missing, for all users

We are using the Windows 2019 server for the remote desktop server, and suddenly all the icons are going like this.


and this happens to all users. Is there a way to fix this? There is no iconcache.db and a restart has not generated the iconcache.db file. Windows Update at the last one also did not solve the problem.

I've also tried creating a new user and logging in, but that has not changed.