Bug,black screen

I tried to read articles from different websites/feeds,and I also tried to use the newsblur app on another smartphone but every time that I open an article I can see any images/videos/text it’s all black!
I downloaded inoreader on the same smartphone and I was able to see the articles without any problems Wich means that the newsblur app is bugging for some reason.
I tried the options to see the article as text and also the story mode but none works.!

please use the existing thread: