won't start on ubuntu 18.04
after working fine for a long time, bitmask-systray will not start any more for me:
/snap/riseup-vpn/17/lib/python2.7/site-packages/leap/common/events/client.py:40: VisibleDeprecationWarning: zmq.eventloop.minitornado is deprecated in pyzmq 14.0 and will be removed.
Install tornado itself to use zmq with the tornado IOLoop.
from zmq.eventloop import zmqstream
trying to launch: /snap/bin/riseup-vpn.bitmask-systray
[+] launching bitmaskd...
/snap/riseup-vpn/17/./bin/bitmask-systray.git: /snap/core/current/usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `CXXABI_1.3.11' not found (required by /snap/riseup-vpn/17/bin/../usr/lib/x86_64-linux-gnu/libmirclient.so.9)
/snap/riseup-vpn/17/./bin/bitmask-systray.git: /snap/core/current/lib/x86_64-linux-gnu/libz.so.1: version `ZLIB_1.2.9' not found (required by /snap/riseup-vpn/17/bin/../usr/lib/x86_64-linux-gnu/libpng16.so.16)
/snap/riseup-vpn/17/./bin/bitmask-systray.git: /snap/core/current/usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `GLIBCXX_3.4.22' not found (required by /snap/riseup-vpn/17/bin/../usr/lib/x86_64-linux-gnu/libmircommon.so.7)
[anonvpn] Systray Quitted.
[bitmask] terminating bitmaskd...
[bitmask] cleaning up files