I am failed to edit any statements on any Wikidata item. "Edit" link is missed. Also I can not expand references section.
Messages from browser console:
Most probably this is related to browser version: Firefox ESR x32 v52.9.0 (it is the latest version available for WinXP. Answers to possible questions: I can not update to more modern version of Windows because have some hardware incompatible with never versions. I know about security issues in old software, the issues are closed using other ways than OS upgrade).
The issue appears between 2021-12-15 and 2021-12-17. Everything worked fine before December 16 or 17. Only Wikidata items editor is broken. Usual pages editor works fine both on Wikidata and Wikipedia.
What I try already without success:
- clear browser cache, cookies and other information
- private mode
- disabling all gadgets
- different themes
- add ?debug=1 to item URL
- another browser (Opera v36.0.2130.80)