404 error when trying to save settings

Again, thank you so much for your response. I had to respond here as gmail is giving me the following error when I try to reply to your response earlier: A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: alchemical9@gmail.com (ultimately generated from support@xnau.com ) host gmail-smtp-in.l.google.com [172.217.75.26] SMTP error from remote mail server after end of data: 550-5.7.1 [50.28.106.77 19] Gmail has detected that this message is likely 550-5.7.1 suspicious due to the very low reputation of the sending domain. To 550-5.7.1 best protect our users from spam, the message has been blocked. For 550-5.7.1 more information, go to 550 5.7.1 https://support.google.com/mail/answer/188131 5a478bee46e88-3074db32e20si21357088eec.17 – gsmtp I reinstalled WP7, no change I deactivated all plug-ins to see if there was an issue with another plug-in, no change I installed WP Debugging plug-in and no errors popped up I am at a loss and this is a good plug-in for what the department needs for the State Police Alumni. Any ideas would be welcome. If you need it, I can even provide you access to the site to see. Thanks again in advance. Jim The page I need help with: [ log in to see the link] Found the issue. The plug-in was being tagged with MOD-SECURITY rule 942360. Once I whitleisted that rule for the domain, it now works. ModSecurity rule 942360 is part of the OWASP Core Rule Set (CRS) , specifically located in the REQUEST-942-APPLICATION-ATTACK-SQLI.conf file. Its main purpose is to detect concatenated basic SQL injection (SQLi) and SQL Local File Inclusion (SQL-LFI) attempts