I solve te issue editing /usr/share/glib-2.0/schemas/com.gexperts.Tilix.gschema.xml
search <key name="session-name" type="s"> and replace the next line <default>${title}</default> with <default>'Default'</default> My file at the end looklike this: <key name="session-name" type="s"> <!-- <default>${title}</default> --> <default>'Default'</default> Save and sudo glib-compile-schemas /usr/share/glib-2.0/schemas/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1856347 Title: Tilix unable to open theme parsing error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/tilix/+bug/1856347/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs