Installation ok but whitescreen when I check the website

I prepared my website locally on my own computer server, everything was working fine, then I installed WordPress on a asmallorange server, installation seamed to work fine (except that I was asked password while an automatic password was normally generated I think last times I used WordPress.
Everything works in admin, default theme is selected, this is the one I am using but I have a white screen when I try to visualize the website.
Any idea what’s going on here?