Soft reject error - what it means?

First i just fix, now my theme will work for PHP from 2010…

But what is this second error? It shows on some WP core files and in earlier soft reject I wasn’t exist.

Thanks

Any one can help?

It may be difficult for someone to troubleshoot without viewing the referenced theme files:

/themes/happiness/index.php
/themes/happiness/sidebar.php

You may also want to investigate if it’s related to:

https://core.trac.wordpress.org/ticket/22952

It’s from your theme. Look all the code carefully.
Somewhere you made a mistake.

ok I think I fund error but how can I check it ? What debugger they use for this?

You should install the Debug Bar plugin.

I got it but I do not see this bugs.