nm-applet does not appear in notification area

[Matthew J Prator]

I have to log in to a wifi service via PEAP at my university. After doing this, on each successive reboot my nm-applet does not appear in my notification area (all my other applets are still there). I can get the applet to appear by running "nm-applet" in a terminal. I do get two notifications in the terminal as nm-applet loads:

(nm-applet:3100): Gtk-WARNING **: Theme parsing error: gtk-main.css:69:33: Failed to import: Error opening file: No such file or directory

(nm-applet:3100): Gdk-CRITICAL **: gdk_window_thaw_toplevel_updates: assertion 'window->update_and_descendants_freeze_count > 0' failed

I have installed Ubuntu Mate twice on my system, and the applet works fine after logging into various networks until I set up the PEAP login. Also, even if the applet doesn't appear I am still connected to any saved wifi network within range.
I am running Ubuntu Mate 16.04, with Mate 1.12.1 on a Dell Latitude e6410.
Thank you.

[Matthew J Prator (mjprator)]

This is on ubuntu mate (64 bit) 16.04, mate version 1.12.1

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Diego Foglino (biker84)]

I have update ubuntu mate from 16.04 at 18.04.
Now icon not appear, but the connection wi-fi work fine

[Sebastien Bacher (seb128)]

Could someone having the issue add their journalctl log to the bug after a login showing the problem? also do indicate the time around which one you started the session

[Launchpad Janitor (janitor)]

[Expired for network-manager-applet (Ubuntu) because there has been no activity for 60 days.]