Sign in with Apple fails with invalid private key due to newline handling in UI

Hi, while setting up sign in with apple , I am getting** invalid private key**.. I have tried pasted my private key as it is after downloading, removed spaces and new line in other to have a single line but none of it worked. How could I resolve this issue ? Any insight you can provide will be much more helpful. Thanks in advance

Fixed it by manually inserting private key into table which required to preserve the original private key format i.e it should contain new line parameter, from UI these new line got changed into white space which was resulting invalidation of private key.