Application Problem with Sony Xperia XZ1

[katyanick12]

Hello, my kid has Xperia XZ1 mobile phone, he is trying to install a learning app downloaded from the official website. But it continuously showing an error. I have attached the image, please suggest me a solution. 

I know the mobile is slightly outdated but I don't think, it is the cause of problem.

[EMS_MO72]

Is there a way to download it from Google Play Store?

If not, try to download it from the website using another browser and check ?