[Forum] Cannot use toolbar in edit mode


I have an issue on the forum : after posting a comment and clicking on “Edit (XX minutes)”, I get an error in the console and buttons do nothing.

Chrome :
Uncaught TypeError: Cannot read property 'toLowerCase' of undefined at Object.AttachTo (buttonbarplus.js?v=1.7.7:248) at HTMLTextAreaElement.<anonymous> (buttonbar.js?v=1.7.1:235) at Function.each (jquery.min.js?v=2.3.1:4) at init.each (jquery.min.js?v=2.3.1:4) at HTMLDocument.init (buttonbar.js?v=1.7.1:230) at HTMLDocument.dispatch (jquery.min.js?v=2.3.1:5) at HTMLDocument.v.handle (jquery.min.js?v=2.3.1:5) at Object.trigger (jquery.min.js?v=2.3.1:5) at HTMLDocument.<anonymous> (jquery.min.js?v=2.3.1:5) at Function.each (jquery.min.js?v=2.3.1:4)

Firefox :

TypeError: format is undefined [En savoir plus]

Note : I don’t have this error when editing the first post since it opens a new page.