I'm running Feren OS which is based off of Ubuntu, Linux Mint, and Debian. Whenever I try to install or update software using a GUI like Store or Update Manager, I get this error:
org.freedesktop.DBus.Error.NoReply: Message recipient disconnected from message bus without replying
The update application is called mintUpdate and the store is just Feren Store.
I'm pretty sure it has something to do with the policy kit.
I am able to use apt just fine, this only happens with GUI-based updates and installations.