ReCAPTCHA error on Chromebook that only allows approved sites.

I have my kids' Chromebooks set up to only allow approved sites. When they try to join a zoom meeting, they are getting a reCAPTCHA error. ("You failed the reCAPTCHA verification") If I change the setting to allow all sites, they can join. I've tried on two different devices with 2 different google accounts. Is there a site I can allow that will enable reCAPTCHA validation without removing the filtering I have set up on google Family Link?  This was not an issue last spring; we just encountered it at the beginning of this school year.