The console shows me:
Uncaught TypeError: Cannot create property ‘guid’ on string ‘.dropdown-menu.show’
at Object.add (wpo-minify-header-8b3350d7.min.js:2:40879)
at s.event.add (wpo-minify-header-8b3350d7.min.js:5:7886)
at HTMLDocument. (wpo-minify-header-8b3350d7.min.js:2:40109)
at Function.each (wpo-minify-header-8b3350d7.min.js:2:3003)
at s.fn.init.each (wpo-minify-header-8b3350d7.min.js:2:1481)
at Ee (wpo-minify-header-8b3350d7.min.js:2:40085)
at s.fn.init.on (wpo-minify-header-8b3350d7.min.js:2:46595)
at HTMLDocument.init (wpo-minify-header-8b3350d7.min.js:517:265)
at e (wpo-minify-header-8b3350d7.min.js:2:30038)
at t (wpo-minify-header-8b3350d7.min.js:2:30340)
