The activities button, time, icons, everything is gone on my wingpanel. I have tried restarting my computer and killing the wingpanel, but neither of those have helped. I would really appreciate some support, thanks.
I have been having the same issues for the past 1 month, never faced it before in my roughly 2 years of using eOS as my primary OS.
Running "wingpanel" in terminal seems to bring it back, but it's an active process in the terminal, so if I close terminal, I lose the wingpanel again.
Also the wingpanel only disappears when I click on the sound icon, the wifi, bluetooth,date, applications button all work fine.
Tried uninstalling and reinstalling it, didn't work. Let me know if something works for you.
Edit 1: Now I am unable to login to eOS. Get the following error code "elementary os session returned error code 1". Welp... :(
Edit 2: I solved the wingpanel issue by reinstalling the default music player. :)