Hi, sorry to hear it. Please try the following steps:
Open iLok License Manager, and make sure that the Blackhole license is activated to your machine or iLok.
Open Logic, and go to Logic Pro X -> Preferences -> Plugin Manager
Select/highlight "Blackhole", and then click "Reset and Rescan Selection". The plugin should validate. If not, please copy the output of the white validation window that appears, and attach it to a post here.