Why can't customers pass robot verification at checkout?

Hi there,

When customers attempt to sign in at checkout they are receiving this page ( linked image ). They are unable to submit a robot verification and can’t log in. Shopify support cannot help and I want to avoid reaching out to the theme developers as they are unhelpful.

If someone could assist that would be amazing.

https://scontent.cdninstagram.com/v/t1.15752-9/298822167_1116814935921851_2737677646895385741_n.jpg?stp=cp0_dst-jpg_e15_fr_q65&_nc_cat=110&ccb=1-7&_nc_sid=5a057b&_nc_ohc=Obxvg_3YM_oAX9ZMUDm&_nc_ad=z-m&_nc_cid=0&_nc_ht=scontent.cdninstagram.com&oh=03_AVKRBhsogsWYT6nCNDCtR4B5w3yqvS2T5VoFKCXgGYSQiQ&oe=6342F4A1

Thank you,