When you try to start the editor (/lp editor) and an error appears in the server console (502 Bad Gateway) and a link to the editor is not generated.
Pastebin: https://pastebin.com/9LCDweki
Already got one open :) https://github.com/lucko/LuckPerms/issues/1448
I think that is related to another issue: https://github.com/lucko/LuckPerms/issues/1448
+1
Web-site is already working, command operational.
Thanks for reporting - all fixed now :)