Documents / Sentinel Security / Troubleshooting

I can't log in after setting up reCAPTCHA

Published: 2026.03.18 Updated: 2026.03.20 As of v1.5.29

Q. I can't log in after setting up reCAPTCHA

A. This is typically caused by incorrect API key configuration or a domain registration mismatch.

Possible Causes

CauseHow to Verify
Site key and secret key are swappedCheck in the Google reCAPTCHA admin console
Domain not registeredVerify the correct domain is set under "Domains" in the admin console
reCAPTCHA v2/v3 version mismatchConfirm the version selected in the admin console matches the plugin settings
Browser extension interferenceTemporarily disable ad blockers or Privacy Badger

Recovery Steps

  1. Connect to your server via FTP/SFTP
  2. Rename the /wp-content/plugins/sentinel-security folder to disable the plugin
  3. Log in via /wp-login.php
  4. Rename the folder back and reactivate the plugin
  5. Go to SentinelSecurity → Login Security → reCAPTCHA and review/fix the settings

Correct Setup Procedure

  1. Go to the Google reCAPTCHA admin console
  2. Confirm that your site's domain is correctly registered (pay attention to www vs. non-www)
  3. Enter the Site Key (public key) into the plugin's "Site Key" field
  4. Enter the Secret Key (private key) into the "Secret Key" field
  5. Verify that the reCAPTCHA version in the plugin settings matches the version selected in the admin console
For detailed configuration instructions, see reCAPTCHA Integration.