If I put a CD into my computer it appears in Dolphin on the left hand side where it sais 'Audio CD'. However if I click on this the contents do not appear in the main window of Dolphin. Also I cant play the CD or find any other way of accessing it. This applies to other CDs not just Audio. In the past I have accessed CDs without problems on this same computer.
It may be relevant that I often get an error message something like 'apt update cant access CD drive' (I cant remember the exact wording).
Any help would be very much appreciated. Steve