things really don’t stop working by themselves. I did not change anything on your site or your server . only you will know what you did or what got updated/changed

that said, looking at your pages console you have a bunch javascript errors and cross site scripting issues…

looking at the source code of your pages my guess would be that whatever plugin is minifying or combining your javascripts is doing it wrong and/or in the wrong order (although it might also be the way you set it up, so not necessarily the fault of that plugin)

i would suggest you turn that plugin off to find out if indeed it is the problem and then reconfigure it if needs be