EDIT: see if anything on this page is related to your particular active theme.
Below are instructions for disabling your plugins as a basic troubleshooting step. Often a misbehaving plugin can give the results you’re experiencing.
If you have access to your admin pages, try disabling your plugins.
If you can’t access your admin pages, you’ll need to use an FTP client (like FileZilla), or your host’s cpanel (or File Manager) and navigate to the files on the server.
In your WP installation there, find wp-content/plugins and rename that plugin folder to something like plugins-hold. That will disable all plugins and hopefully allow you to get back into WP admin. Rename the folder back to the original. Then you can start re-activating plugins until you find the problem one(s).
If that doesn’t do it, likewise rename your active theme’s folder so that WP will use a default WP theme temporarily. That way you can rule out whether the theme is at fault or not.
