What app is >400MB? I tried to find one. Are apps that size suitable for a mid-range phone?
did you already try something for troubleshooting?
Clear Cache and clear the data in google play store might help (just a suggestion because it helped me once with another phone I had before I joined HMD).
So, this is not what you mean?
I see, 1.29Gb. downloading now. installed and open. No problem.
If you google on that error, you will see a lot of links about that. Maybe there's a solution for you.