i have this error always, too.
This is a bug from oracle. They have switched the numbers.
I think it is the error ORA-12154
This Error is that on on side there is no listner or the is an error that conld not resolve service name.
Really there is a problem in the corner of the listner.
Than look at the listner.log.
I can say it with 1000%, because have hat the same problem
You must change your tnsnames.ora on your pc ,too.
There is garantiered a problem with the alis in the tnsnames.ora