Hey!
I've been working on a Processwire installation (3.0.123) for a few days now and I must have made a big mistake this morning because the links in the admin's main menu no longer appear.
This is not related to the admin theme, because the bug occurs with all themes (Default, Reno, Uikit).
I tried to reinstall with the dev version (3.0.136), but the problem is still there. I also uninstalled all the modules I had added, without success. There is no error in the js console.
I still can access/view/edit the pages by going through the admin/page list.
Thanks in advance for your help!