easier workaround:
workrave --display=:0
(from the askubuntu thread referred to by OP)
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https://bugs.launchpad.net/bugs/1726244
Title:
Workrave applet does not work in Gnome Shell
+1
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https://bugs.launchpad.net/bugs/1726244
Title:
Workrave applet does not work in Gnome Shell 17.10 under Xorg
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: workrave (Ubuntu)
Status: New => Confirmed
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Title:
