Thread:Lord Shaman/@comment-39007672-20190730152138/@comment-24661512-20190730191604

It is a crash when trying to load template in the visual editor, but with errors while the page is packed by numerous other templates, then replacing all templates with the top one. It doesn't matter if you used or just ran into visual editor by default before selecting wiki text.

This crash cannot be reverted normally, it needs either rollback or copy-paste the code of previous version to restore it. To avoid this you may use source editor and make sure you have checked the preview before submission.