Can I ask why you want to add Chromium to the exclusions list (the purpose/action you seek to achieve in doing this) ?
If it is only chrome.exe that you wish to exclude then use the full path to that file as the wildcard * leaves a large hole in your protection.
If you are seeking to have the actions of chrome.exe excluded, that isn’t the purpose of the exclusions, you can exclude a file from being scanned, but not its actions.