Broken slider (It does not work with external images and rus text)

1) no external images work

I insert external images – everything is fine:
https://image.prntscr.com/image/959f77f69aa043269e5b48485336cb98.png

Then save slider – images disappear, slider code stops working:
https://image.prntscr.com/image/0d538d5bcd5447568fb316d1192ecac8.png

2) russian text does not work in the title and caption of slide.

I write text – all fine:
https://image.prntscr.com/image/25cea78863a741d39dfae3eda88f8663.png

then save – broken text:
https://image.prntscr.com/image/73559f7c21554cbe844340874bd637e3.png