Hello Andrea Mattia,
I am glad to answer this question for you and hope it helps you.
1.Ensure that the current domain controller has normal name resolution and a stable network connection. Check DNS settings and network connectivity and make sure that the domain controller is able to communicate properly over the network.
2.Check for missing files or folders in the sysvol folder. If they are found to be missing, you can try to manually create the appropriate folders and files. Note that the manual creation of Group Policy files and folders needs to follow the correct naming convention and the content needs to be consistent with the corresponding files on other domain controllers.
3.If the problem persists, it may be due to file replication delays. Wait for some time for the files to be synchronized and replicated between domain controllers. Try to apply the Group Policy settings again later.
4.Check if any program or tool has deleted the relevant files from the system. If you find any files deleted by mistake, try to restore or reinstall the appropriate program and make sure the files are complete and correct.
I hope the information above is helpful.
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