Juris Doctor class enrolments?

hi people - i'm commencing the JD this year and have been trying to use CAS to choose classes for semester one but it just gives me an error message/won't log me in - is this because you don't need to choose classes for law units, or should i escalate this with the uni?

quietly panicking because i really need to go to the 5/6pm tutorials - i work full time so won't be available for daytime classes 😭

i didn't do my undergrad at UWA and these systems are seriously confusing like what...