A forum search would have resulted in the following advice:
The workaround is as follows:
groupadd -g 23 nohidproc
usermod -a -G nohidproc polkitd
mount -o remount,rw,hidepid=2,gid=nohidproc /proc
systemctl restart polkit
###Add the following in /etc/fstab as well
echo "proc /proc proc defaults,hidepid=2,gid=nohidproc 0 0" >> /etc/fstab
###After mount the new mountpoint
mount -a
systemctl restart polkit