There may be several reasons why you can’t enable reCAPTCHA.
1. Can’t Enable reCAPTCHA
Check that your reCAPTCHA keys have been entered correctly in your plugin settings.
To check keys have been added correctly to reCAPTCHA key field, Go to your installed plugin Settings > CAPTCHA.
2. Invalid Site Key and Secret key
An invalid site key may be why your reCAPTCHA is not working.
“ERROR for site owner: Invalid site key” This error message suggests that you entered an invalid site key in your Settings > CAPTCHA or may be deleted from your Google reCAPTCHA account.
The reCAPTCHA credentials you get from Google must be verified to ensure they correspond with the keys entered into your plugin settings.
Google should authorize the secret key to communicate between your website and the reCAPTCHA server.
Re-generate your Google reCAPTCHA key on the Google site to fix this invalid site key.
If you re-generate reCAPTCHA keys, then they must be added to your plugin site key.
3. Google reCAPTCHA Verification Failed.
“Google reCAPTCHA verification failed, please try again later.” may appear after form submission.
Temporarily disable Javascript optimization options. Then, save these changes and clear the cache to verify if the reCAPTCHA issue has been resolved.
4. Check reCAPTCHA version
Check the reCAPTCHA version if you currently switch from reCAPTCHA2 to reCAPTCHA3.
5. “This field is required” Error Message.
This problem is frequently brought on by a conflict with another reCAPTCHA code. You might have many reCAPTCHAs that have been loaded by different plugins or by the theme of your website.
For this error, check the console section.
On the right side of your page, click on three vertical dots to open inspect tool, then choose the Console tab.
If reCAPTCHA has been loaded more than once, a console error message like the one below will appear.
To fix this issue, disable the “Enable Google Page Speed dashboard widget” option; go to Performance ? General Settings ? Miscellaneous.
Activate the No-conflict mode in the reCAPTCHA setting, and see if it helps if the conflicting reCAPTCHA option isn't visible.
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