Unable to submit codes for practice problems

I am unable to submit codes for practice problems. Whenever i submit a code i get the message that this language is not allowed for the problem. I am submitting codes using C.

All the allowed languages are mentioned in the list, right after the problem statement.

see below, list of languages is given(for that particular problem).
The problem you are trying must not be having ā€œCā€ as allowed language.

you can only submit in one of the mentioned language.

see below