Apple Music plays on Cellular but not wifi?

Hi all! I've just downloaded Apple Music. For some reason I can listen to songs using cellular data on my mobile, but the second I switch to wifi it won't play anything. Strangely though, when I am using wifi on my laptop, it lets me listen to Apple Music. Same house. Same wifi. Can anyone help? I can't seem to find a solid solution. Using Optus 5G Nokia modem. Thanks!