Use Lookup Data Table to check duplicate and other errors...need help

@Palaniyappan Tried to follow your reply on How To send outlook email including the name from an excel DataTable as the body - #2 by venkatmalla6

But got an error “Not all generic types could be resolved.” when “create a list variable named outlist in the variable panel of type system.collections.generic.list(of string)”

I’m using Send Mail Message of GSuite instead of Outlook, will that be the problem?

Thanks