Hi @jocklyon18 ,
Using the handset, check in ''Menu > Answering Setup > Record Time'' that it is NOT set to ''Announce only'' as this will not let callers leave a message. Select either 1 or 4 minutes depending on the amount of recording time you want to give the caller.
Are there still any “old” messages left in the answering machine? This may give you some idea of when the problem started.