We use the private message addon. Since some weeks we notice increasing performance issues when opening the private messages. Also it seems that users with a lot of PN`s have longer loading times inside the forum. Today a user with over 350 PN`s reported 404 errors when trying to open his pn folder. We did some research and i can say that a user without pn`s have loading times of arround 1sec, users with a lot of pn`s between 5-10sec. BTW our hosting is a premium wordpress hosting with 6cpu and 6gb ram.
404 error
Please note, all questions related to paid addons should be asked in the gVectors.com forum. Here, we only support issues related to the free wpForo plugin.
The wpForo Private Messages addon's support forum: https://gvectors.com/forum/wpforo-private-messages/