Hello Olga,
I am giving you credentials to a clone site where you can verify all issues.
Please note, I found also that contact form, even without reCAPTCHA, does not work in Safari (I use 13.0.3 latest). In Chrome it works, send email, but shows Error message.
On reCAPTCHA Google console I see message that my site does not verify reCAPTCHA solution and shows link to https://developers.google.com/recaptcha/docs/verify#api-request
Regards