What is reCAPTCHA and why do we implement it?
reCAPTCHA is implemented as a security measure to verify the legitimacy of a request, or that the attempted payment is valid.
Please note that the error in question is not caused by Sellix.
To mediate a potential fix, you might need to change the device at hand or otherwise refresh your IP address.
What should do if none of the above works?
If the problem persists, you may want to contact Google's Support team and explain the situation in detail so they may better assist you.