why am i getting errors on Photon pun2 import.?

I am trying to import photon pun2 free but cant use single method from it. also all the imported scripts show red in vs code. can someone please tell me what am i doing wrong here. i’m stuck on this from Past 2 days. i checked unity verson requirement , it sats 20174.7+ i am using 2019.4.11f
Thank you

figured it out. installed unity 2019.4.17 and now it’s working. may be unity 2019.4.11 was not compatible.