Ok it sounds like the problem may not be related to BPS so let’s eliminate that BPS has anything to do with the problem. Do these steps below to eliminate or confirm that BPS has something to do with the WSL problem. After you have done these troubleshooting steps below test WSL and let me know if you are still seeing the 403 error.
1. Make a backup of your .htaccess files first by going to the B-Core Backup & Restore tab page. Select the Backup htaccess Files Radio button and click the Backup Files button.
2. On the Security Modes page Activate Default Mode for the Root Folder BulletProof Mode.
3. On the Security Modes page select the Delete wp-admin .htaccess File Radio button and click the Activate button to deactivate/delete the wp-admin .htaccess file.
4. On the Security Modes page select the Delete plugins .htaccess File Radio button and click the Activate button to deactivate/delete the Plugin Firewall .htaccess file.
8. If the issue/problem is related to Login Security turn Off Login Security on the Login Security & Monitoring page.
9. If the the issue/problem is related to JTC Anti-Spam turn Off JTC Anti-Spam on the JTC Anti-Spam page.