I am not familiar with this error message and our plugin does not just die on a blank page when it encounters an error. Are you sure you have the support forum for the right reCaptcha plugin?
Thanks for quick the reply,
Yes I am sure. I fill in my username and password, get the confirmation from recaptcha and whenever I click on the login button I am getting this error. URL is wp-login.php at that point.
Please let me know if I can provide anything else to solve this problem.
The plugin won’t generate an error if the API keys are wrong, and certainly not on a blank page. It will just let you in without displaying the reCaptcha. There are nearly a dozen reCaptcha plugins, so please double-check you have the right one. If it is preventing login, remove the directory entirely from the filesystem (e.g. via sftp) and that will disable the plugin and let you back in.