FYI I had the exact same problem (18.10 updated with all the latest updates as of this moment), however I managed to get it working after recompiling the 'tilix' package from sources. For reference I used the instructions on this forum page:
https://ubuntuforums.org/showthread.php?t=101097 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782606 Title: 18.10 : Tilix symbol lookup error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/tilix/+bug/1782606/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs