If you used a repack (like DODI or FitGirl), turn off your antivirus temporarily and run the installer again (or re-extract the crack files) to ensure EMP.dll is placed in the bin folder.
"EMP.dll is either not designed to run on Windows or it contains an error." Watch Dogs Legion Emp.dll Download
If none of the above solutions work, you might want to reach out to Ubisoft's customer support. They can provide game-specific troubleshooting steps or a patch if there's a known issue with the game that causes emp.dll errors. If you used a repack (like DODI or