invalid-input-response with Cloudflare

Hi,
I have 4 forms on my website and two of them are working fine with reCaptcha
the other two are not showing reCaptcha window and I expected this is why I get an error and can't send form

after reading your advices I configured Cloudflare in one of the forms and it looks like working fine ( I can see it), but the error is still the same - invalid-input-response:
https://osiedlegrono.pl/wklad-wlasny

here is the Google reCaptcha working fine:
https://osiedlegrono.pl/tabela-mieszkan-lokatorskich/budynek-a/mieszkanie-nr-6-budynek-a
https://osiedlegrono.pl/tabela-mieszkan-lokatorskich/budynek-a/mieszkanie-nr-7-budynek-a

config: BaForms 2.3.0.1 and Joola 4.4.4 and Captcha and reCAPTCHA 2.0

I'm sending the FTP access and Joomla admin access via your contact form and ask for your help :)

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