It looks like a few others have come across the error where the CLR cannot create a secure connection.  In my experience this is due to not forcing a TLS...

I was also getting the error:

OLE DB provider "MSDASQL" for linked server "MAS90_LINK" returned message "[ProvideX][ODBC Driver][FILEIO]Table is not accessible".

Msg 7306, Level 16, State 2, Line 1

I found that...