I found a solution for this on https://askubuntu.com/questions/966987/indicator-icons-do-not-appear-after-upgrade-to-ubuntu-17-10/972671#972671. This bug is related to https://bugs.launchpad.net/ubuntu/+source/indicator-application/+bug/1728449.
I found a solution for this on https:/ /askubuntu. com/questions/ 966987/ indicator- icons-do- not-appear- after-upgrade- to-ubuntu- 17-10/972671# 972671. This bug is related to https:/ /bugs.launchpad .net/ubuntu/ +source/ indicator- application/ +bug/1728449.