Corrupted Windows system files can prevent any DLL from loading correctly.
: Security software may incorrectly flag the file as a threat and quarantine it, breaking the link between the executable and its resources. Pathing and Permissions problem loading acadresdll resource file autocad 2021
Your antivirus likely ate the file.
Antivirus programs like McAfee can sometimes block the loading of this DLL or delete it during installation. Corrupted Windows system files can prevent any DLL