Certain boxes I can paste text into just fine on my first two pages but the third page for some reason I cannot paste any text inside it just wont accept it.

Can someone tell me why with certain text boxes it does not allow me to paste text from outside sources? It just simply will not allow me to paste anything inside certain textboxes. is there a certain function I need to add for this?

Ive added a timeline slider to a page on my site and it looks really cool BUT i cant seem to get rid of this stupid text tutorial. also I cant edit any of the text inside the timeline slide