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So I have a PC running only Xubuntu 18.04 LTS, and I just install real VNC's VNC viewer - to access my Raspberry PI remotely. The second time I restarted, the WiFi button disappeared from panel 0 (task bar). I don't think I installed any other software recently before the problem. I had also made a c++ code that gave the error Floating point exception (core dumped) when I run it. The code is compiling normal. The PC is an HP notebook 15.

edit: I can access the internet via auto connect, I can't select the network.

edit: I took one last try at fixing it and now my wifi button, discord button, and dropbox buttons are back.

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Check that you have an indicator plugin, a notification plugin, and a status notifier plugin. If any of these are missing, add them.

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