[xwiki-users] Application/Extension Management

Hello People, I am trying to mange my application and extension and I AM facing some obstacles. One: In the "add extensions" feature, when I try to search any extension to install, the search always return "no results", independent of the search's term. Ps.: My server need to configure a proxy to access the internet, maybe this configuration is interfering the wiki extension search? Two: I installed the "org.xwiki.platform:xwiki-platform-ldap-api 5.0.3" through the "import content" feature. This extension isn't showing in the extension list and I am not able to uninstall it. Anyone can help me? Thank you Danilo Oliveira