ve.Factory.prototype.create throws an Error, "No class registered by that name: undefined" when using the link widget. It can be reproduced with:

1. Start with blank document
2. Hit Ctrl-K
3. Type some page name that doesn't exist
4. Hit escape twice.

This leaves a broken widget that takes several clicks (not sure the exact pattern here) to clear.

5. Try to open the link widget again. It won't be possible, either with Ctrl+K or the button.

This is live on English Wikipedia.

Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=50446