Utilizing any captcha services (sitewide) breaks the LearnPress checkout/registration page

[MattPilz]

Whenever I enable any captcha/bot-protection services sitewide, they appear in the LearnPress registration form but cause errors that prevent submission when registering via the lp-profile (checkout) page. ("learn-press-checkout-form")

EXAMPLE: After installing and activating "Simple Cloudflare Turnstile" the captcha verification appears on the registration form, but on submission throws error "Call to a member function add() on null."

EXAMPLE: After installing and activating "Advanced Google reCAPTCHA" the captcha verification appears on the registration form, but on submission throws error "ERROR: reCAPTCHA verification failed."

Any suggestions would be welcomed. We want to enable a CAPTCHA service, which we currently do for ordinary WP registration and sign-up, but LearnPress is throwing these errors despite the captcha service being embedded automatically into the form.