This appears to be caused by the redirect removing the trailing slash after system/?, I’ve flagged to the team to investigate
Do you have a trailing slash at the end of your import like this? If so that’s probably the culprit and should be able to fix by removing it
import { SomeSystemIcon } from '@wix/wix-ui-icons-common/system/';
Otherwise this is likely on our end and will have to wait for the fix, in the meantime you might have success switching to their old package or using a different icon library temporarily