Why Command Prompt Shows 404 Not Found and How to Fix It - How to Fix Remote Desktop Black Screen After Login-Windows Activation Server Not Available – Quick Fix Guide
Before changing system settings, save your work and note the exact error text so you can compare results after each step.
Extra verification checklist
- Restart the affected app after changing permissions or configuration files.
- Test the same workflow in a clean browser profile or a temporary user account.
- Compare the result on another network if the error may be connection related.