I'm seeing that issue, yes. (I've also removed the recovery line from your constants.php file.)
As the next step, please download a fresh copy of the software from the Client Area and extract it to your desktop.
It will create a folder named ips_xxxxx (xxxxx is random string)
Then use an FTP client and upload the contents of that ips_xxxxx folder to your forum main folder, overwriting when prompted and making sure all files transfer without error.
Once done, first visit the upgrade URL directly at ./admin/upgrade/ to see if there is a minor upgrade that needs to be applied. (Perform that upgrade if one shows.)
Then visit the Admin panel URL and see if you can now login. If you can't, please reply here.