Ultimate Suite cannot load one of its dlls

In some cases, after you've run Excel with Ultimate Suite installed, you might get "Sorry, the add-in cannot load one of its dlls":

To fix the problem, try the solutions that are listed below.

• Restart your PC
  Very often Office updates get stuck and, as a result, many Office add-ins stop working. To force updates, please restart your PC.
• Whitelist Ultimate Suite in your antivirus to prevent false positive detection
• Let Excel create child processes
  Follow the link above to turn off the Do not allow child processes option if the error message you're getting is the same as the one shown in this screenshot:



• Choose "Off by default" for the Windows Security Mandatory ASLR option
• Prevent Windows AppLocker from blocking Ultimate Suite
• For Windows 11 on ARM/Apple Silicon and for Windows on Copilot+ PCs

If none of these solutions was helpful and you're still getting "Sorry, the add-in cannot load one of its dlls", please contact us.