https://meta.discourse.org/t/cannot-read-property-jqxhr-of-undefined/58429?tl=en
Cannot read property 'jqXHR' of undefined - Support - Discourse Meta
Mar 5, 2017 - I just did a minor change in the privacy policy but when I submitted the edit, it would not complete saving (the saving wheel kept spinning and spinning)....
cannotreadpropertyundefinedsupport