Screen for Runmaster app goes half sideways, how to fix it?

[Windows Central Question]

Screen for Runmaster app goes half sideways, how to fix it

I installed twice the runmaster app but twice the screen displays after a while sideways (like if brwosing through a book ) and is than unable to read. How can I fix this?

 

[ven07]

Which phone/device? Seems more like a problem for the dev to solve