Ejabberd 15.11 mod_http_upload not working as intended

hello.

i have posted before about mod_http_upload before on https://www.ejabberd.im/forum/25255/ejabberd-module-modhttpupload-problem

i have upgraded my ejabberd to ver 15.11 tried to configured my ejabberd to enable the mod_http_upload. i follow instruction from github ( https://github.com/processone/ejabberd-contrib/tree/master/mod_http_upload ) to enable the mod.

i checked in Conversation that the mod is enabled but every time I tried to send out attachment in the chat, it will fail. I have no problem sending out text between user.

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