I had a similar issue where I could not connect to any minecraft-related server including dungeons. It turns out it was an issue with the ‘intel killer performance suite’. I went into task manager and force ended any tasks with ‘killer' in the name and it immediately connected again. I then went and uninstalled anything related to it in apps and programs. Check if you have the same useless software on your PC and try closing it / uninstalling it.
I had a similar issue where I could not connect to any minecraft-related server including dungeons. It turns out it was an issue with the ‘intel killer performance suite’. I went into task manager and force ended any tasks with ‘killer' in the name and it immediately connected again. I then went and uninstalled anything related to it in apps and programs. Check if you have the same useless software on your PC and try closing it / uninstalling it.