Magento 2.4.1-p1 CE?: “main.ERROR: Can not resolve reCAPTCHA parameter…”

Question

In /var/log/exception.log, I've been getting the following ERROR for over a week and can't figure out how to fix it:

main.ERROR: Can not resolve reCAPTCHA parameter. {"exception":"[object] (Magento\\Framework\\Exception\\InputException(code: 0): Can not resolve reCAPTCHA parameter. at /var/www/html/magento/vendor/magento/module-re-captcha-ui/Model/CaptchaResponseResolver.php:25)"} []

reCAPTCHA seems to be working, despite the error msg.

I've tried re-setting the file and directory permissions, clearing and flushing cache, re-indexing. None of these things have resolved it.

BTW, I switched my store from production mode to developer mode, but receiving the reCAPTCHA ERROR in the exception.log regardless of mode.

Please tell me how to fix this? Thanks, Evelyn