jQuery (Javascript Library) is broken in my site

If jQuery loading is broken, e.g because 3 extensions load jQuery 3 times in your site

then your options are

1. EITHER disable loading in all extensions (in FLEXIcontent component configuration you can do this (frontend))
and add loading of jQuery in your Joomla Template

2. OR (a bit slower) use a plugin like jqueryeasy to handle the loading of jQuery in frontend (to load it once)