
of course technical issues are always frustrating at the best of times... just need to chill and maybe do your other idea of farming vanquisher as better value for your time in the mean time
ok you misunderstand how the lockout system works...
Step one form a team
Step two go into tunnels
Step Three kill a boss
Step four you are binded to this instance with your current team
Step five you finish this instance with your current team OR if someone has to go/dc's you can replace them with someone UNBINDED TO OTHER INSTANCES
Step six you complete instance
you are now on dungeon lockout, you have to wait, the timer should show in your character lockout section should be 72+ hours... (3 days lockout mate for that instance... you need 4 kills for quest... thats over 12 days = 2 weeks mate)
step seven wait for your lockout to disappear
step eight complete step one to seven again until quest is complete.
The dungeon it is time gated... you misunderstand the no limits part of release... it applies to Wards and wards only (which i explained to you earlier)... they don't want hardcore people completing the new content in first 20 hours then wanting new gear again... its minimum two weeks unless super lucky rng from drops. You can't rush it mate.