Vexa's Lab
You should not have to wait for the event.
https://wiki.guildwars2.com/wiki/Vexa%27s_Lab
If you continue to have issue, you can contact the CS Team via the ‘Support’ link above/below for assistance.
Good luck.
The event can take a while to spawn. Just wait, it’ll start.
I have the exact same problem. I also need to complete this event but it seems to be stalled.
So after an update yesterday I ported immediately there to see if the event had restarted. Several other people had the same idea and we made short work of the enemies that spawn from the jail cells. After they were all defeated, everything once again “broke” and the mission would not progress.
A few of us chatted and I discovered that this affected more than just the Bolt legendary journey but other legendary journeys as well. We submitted in-game bug reports as well as reports on the gw2 web site.
PLEASE FIX THIS EVENT. I need my precursor now more than ever for the impending expansion.
Edit: Discovered this thread in the bug report section too https://forum-en.gw2archive.eu/forum/support/bugs/Vexa-s-Lab
(edited by Brigand.9502)