the problem you are seeing is that SnapManager's license is not found on either the stroage system(s) hosting some of the databases on that server or the server based license is not found on the SMSQL server and/or the SMSQL designed verification server. It makes sense that in such case all snapdrive operation are fine, because it is the SMSQL license the erorr is talking about.
When you mentioned cluster, did you mean the windows cluster or the Storage system cluster? It isn't clear to me whether you have server based or storage based license.Server based license is installed on SMSQL server and (if you have a remote or verification server) on the respective remote/verification server.Storage based is installed on all storage sytems who are hosting lun's or shares which will be in use by SQL server. You can't have a mix of both storage bqased and server based as that causes issues.
finally, if all licenses are correctly installed, yoy may experience a configuration issue, as SMSQL checks its storage based license through SnapDrive, so if SnapDrive cannot communicate with one of the Storage Systems hosting lun's or shares.
hope that gies youa hint, else, please log a support case.
cheers,
Domenico