The cc-license-viewer is activated. So since the traceback includes the name of that plugin I assume now that the answer to your question is: yes, I do use the cc-license-viewer plugin provided by Ubuntu.
-- cc-license-viewer markup error https://bugs.launchpad.net/bugs/164490 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs