Plug-in not loading in Grasshopper both Rhino 5 and 6

Hello,
which could be the reasons why a plug-in is not loading in Grasshopper both Rhino 5 and 6?
The gha file is unblocked and located in the Libraries folder. The plug-in is Syntactic.

Thank you.

Francesco

Solved. In Grasshopper Developer Settings the option Memory Load *.GHA aqssemblies with COFF byte arrays was unchecked. (Probably because required by another plug-in)