I cannot continue with my Portuguese studies.
Apparently because of some programming error, I cannot continue with my Portuguese studies. Unless this problem can be resolved, I don't want to continue using Duolingo.
Could you try to be more precise? What kind of problem? When did it occur for the first time? Portuguese is still beta, we need to remember that, and giving detailed feedback helps the staff to fix all the bugs. Just simply telling that "there is something wrong somewhere" isn't enough.