Thank you so much for quick response Dylan, I will try answer your questions as best as I can.
Most of the problems come from mobile app. I can provide few screens on which the problems are visible. I am logged on zephyr admin account, I believe I have given all necessary access to the app. Despite it seems like it is not loading everything it has to. I also want to add that I dont have any problems using the app on desktop.
Images:
https://postimg.cc/4mhHGGRM
https://postimg.cc/FY5ds69K
https://postimg.cc/SXmnczYF
https://postimg.cc/RW733TFL
https://postimg.cc/gw4nsk3w
Looking forward to your reply
Kamil