403 error on creating new user

[lijin4353]

Steps to reproduce the issue

A 404 error occurred after the user was created using the background

After installing joomla normally, I did not make any Settings, but 404 appeared after adding a New user directly in the backend, and 404 appeared after several buttons like Save Save & Close Save & New Cancel were clicked
Specific operation process can be downloaded below Excel file
URL:
http://sumcms.sumking.jp/404.xlsx

Expected result

Displays the page where the user was successfully added

Actual result

Display 404 pages

System information (as much as possible)

Setting	Value
PHP Built On	Linux users703.phy.lolipop.jp 4.14.33-300.1.1.hl6.x86_64 #1 SMP Mon Apr 9 03:08:03 JST 2018 x86_64
Database Type	mysql
Database Version	5.6.23-log
Database Collation	utf8_general_ci
Database Connection Collation	utf8mb4_general_ci
PHP Version	7.1.5
Web Server	Apache
WebServer to PHP Interface	cgi-fcgi
Joomla! Version	Joomla! 3.9.11 Stable [ Amani ] 13-August-2019 15:00 GMT
Joomla! Platform Version	Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT
User Agent	Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36

Additional comments

[ghost]

Please give more system information (like which 3.9-Joomla-Version, etc.) and how to reproduce the issue.

Can't confirm creating a new user in backend.

[lijin4353]

请提供更多系统信息（如3.9-Joomla-Version等）以及如何重现该问题。

无法确认在后端创建新用户。

A screenshot of the 404 action appears
URL:http://sumcms.sumking.jp/404.xlsx

Setting	Value
PHP Built On	Linux users703.phy.lolipop.jp 4.14.33-300.1.1.hl6.x86_64 #1 SMP Mon Apr 9 03:08:03 JST 2018 x86_64
Database Type	mysql
Database Version	5.6.23-log
Database Collation	utf8_general_ci
Database Connection Collation	utf8mb4_general_ci
PHP Version	7.1.5
Web Server	Apache
WebServer to PHP Interface	cgi-fcgi
Joomla! Version	Joomla! 3.9.11 Stable [ Amani ] 13-August-2019 15:00 GMT
Joomla! Platform Version	Joomla Platform 13.1.0 Stable [ Curiosity ] 24-Apr-2013 00:00 GMT
User Agent	Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36

[ghost]

how to reproduce the issue.

please give information how you get the issue (frontend, backend, when did 404 come up, …) so developers don't have to guess.

[lijin4353]

how to reproduce the issue.

please give information how you get the issue (frontend, backend, when did 404 come up, …) so developers don't have to guess.

hello

After installing joomla normally, I did not make any Settings, but 404 appeared after adding a New user directly in the background, and 404 appeared after several buttons like Save Save & Close Save & New Cancel were clicked

Specific operation process can be downloaded below Excel file
URL:
http://sumcms.sumking.jp/404.xlsx

[ghost]

@lijin4353 thanks for the Informations. I hope a dev. will get in touch with it or ask you more details.

[lijin4353]

@lijin4353 thanks for the Informations. I hope a dev. will get in touch with it or ask you more details.

Thank you very much for your help. This problem has been bothering me all day

[ghost]

do you have asked before on Forum as this Repository is for coding?

[SharkyKZ]

It says 403, not 404. It's likely to be caused by your server's firewall.

[lijin4353]

do you have asked before on Forum as this Repository is for coding?

I didn't ask about database coding on Forum

[lijin4353]

It says 403, not 404. It's likely to be caused by your server's firewall.

Thank you for reminding me. It's 403, not 404

[lijin4353]

Thank you very much
The problem was solved
The process of solving a problem
Login server background to turn off WAF function
You need to wait 5-10 minutes

The following file can be downloaded for specific operation
https://pan.baiduwp.com/s/19ZEQcKdwzJooPvqpELL5RQ