app use zero trust account, it is stuck in 'connecting'; even if I reset my

I registered my ZERO TRUST account 2 months ago, I didn’t have a credit card at that time, so on the credit card info enter page, I clicked back to the previous page; then my ZERO TRUST account was successfully registered , I created a team, and downloaded the app, then used the ZERO TRUST account on my iphone 12 with the team, I used it normally for 2 months; but recently, the app zero trust can not connecting, it is stuck in ‘connecting’; I followed the help instructions and reset my iphone’s network settings, but it still stuck in ‘connecting’

I am also in the same situation.