XF 1.3 "An unexpected database error occurred. Please try again later." on user registration

[Tama]

An unexpected database error occurred. Please try again later. appears on /register/register

source code for page doesn't yield anything:

An unexpected database error occurred. Please try again later.

Addons:

Spoiler: Addon list

• AreYouAHuman? 5
• ******* - Auto Close/Move/Delete Thread Inactivity 1.0.1
• Double Post 1.0.7
• Easy ban users 1.0.1
• Minimum Post Length Enforcer 1.0.2
• Most Online User 1.2
• Similar Threads 3.0
• Sitemap for XenForo 1.3.2
• TaigaChat Pro 1.2.0
• Tapatalk 1.9.0
• [bd] Tag Me 2.1.0b
• [Extra License] New User Conversation 1.1.0
• [RT] Online Status Ribbon 1.3.7
• Custom Node Icon 0.9

MySQL database summary:

166 tablesSum3,079,927InnoDBlatin1_swedish_ci941.5 MiB276.8 KiB


This appeared recently on 1.3.1, and is still occurring after an upgrade to 1.3.2 and really has me stumped, so any help would be great.

 

[Mian Shahid]

You can re try after disabling "AreYouAHuman? 5", it may causing this problem.

 

[Tama]

You can re try after disabling "AreYouAHuman? 5", it may causing this problem.

Still occurs after doing so and switching to reCaptcha.

Edit: It only seems to be happening with users that share IPs

 

[Mian Shahid]

Hummm , you can try after disable all plugins/add-ons, if problem continue, then wait for real experts.

 

[Tama]

Anyone been able to shed any light on this, it doesn't happen with all users. Additional info:

• Running apache httpd 2 w/ php 5.5.13 and opcache

 

[Mian Shahid]

If this is not happening with all users then it will be a security plugin or server firewall issue, did you re-tried with disabling all add-ons?