No plugins or themes will update or install just from wpmudev

I have requested previously help with this but nothing has happened. Both my test site and main site, both on there own dedicated server, will not update and wpmudev plugins or themes (and most won't install either). Plugins from any where else update and install fine. The message I get is that it is probably the permissions of my wp-contents folder are wrong. They are correct. Reset the api, did not work.