February 2019
getting effected by the party not ready bug every times trying to solo Q on PC reporting this bug
February 2019
I haven't had this one yet but I did have the "party leader has disconnected" bug. Which I got rid of by deleting the Origin cache.
You could also run Origin as admin.
There is a thread here on the same topic.
You could also try enabling or disabling UPnP on your router. This is a setting which has stopped me connecting to games in the past, depending on how it's set.
February 2019
happened to me few times. you have to restart the game seems to fix problem for me