Plugins Malfunctioning When Installed by Saving Them in The Confluence Installation Directory
Plugins installed from
/WEB-INF/lib appear different or malfunctioning in comparison to the same plugin that is installed from the plugin repository or plugin manager.
Installing plugins from
/WEB-INF/lib is an old plugin installation technique in Confluence. This is no longer a supported way to install plugins in Confluence.
Install plugins from Confluence administration console, via plugins manager or plugins repository.