A 403 Forbidden error was encountered while trying to use an errordocument to handle the request

When apache was configured to connect to JBoss this evening, it was found that Apache's static files could be accessed, but dynamic files could not be accessed. I checked it online. Most of them are in the httpd. conf file.
<Directory/>
Options followsymlinks includes
AllowOverride none
# Order allow, deny
# Allow from all
</Directory>
The following two lines are commented, as shown above, but I tried it and it still didn't work. I couldn't help it. I consulted the director of our company. After a thorough investigation, I found that my Apache proxy module was not opened,
Loadmodule proxy_module modules/mod_proxy.so
Loadmodule proxy_ajp_module modules/mod_proxy_ajp.so
Find the above two lines in the httpd. conf fileCodeRemove the comment.
I am very grateful to my development director. He is a very conscientious person and has become an indispensable pillar of the company in his early 30 s. I would like to learn from him and pay tribute to him!