Yesterday I decided to install the new version of mamp, version 4. During and after the installation, it displayed a message about upgrading my database to a newer mysql version. I did it, and I did not saw any errors. But then, my site did not function, nothing displayed in my browsers, just a blank page, no error messages, nothing! It is the first time through all the years I use mamp, that I have such issue. Where is the problem? What happened and now I can't see my local site? Should I check something or change something in my connection php page? I hope somebody can help me to solve this problem, as after this upgrading I can't browse my local site.