eSteem not working on IOS 12.1.4

I have been trying to read/post stories on eSteem on my iPhone7 in the last few months. It opens a white window and looks like it's constantly loading, but nothing else appears. I've logged in as I always do. On a desktop, the login details work. I reinstalled the app to see if it would make a difference, but it doesn't. I currently work on IOS 12.1.4, but the problem already exists since at least 4 months. Do other people have similar problems?

I wanted to post some videos during the last few months, but I typically only do that while commuting. So I hope there is a solution.

Thanks for any help.