OK, well, frustratingly, it works OK on my server. Although I did find one oddity, that the 'params' field in your #__fabrik_connections table is malformed, with a single quote like {'}. You need to edit that in phpMyAdmin and remove the single quote, so it's just {}.
But I'm not getting the FabrikWorker error, which means the class_alias() stuff we are doing to point those old names at the new autoloaded classes is working. I can display all Fabrik pages normally, on front and back end.
The only difference I can see between my server and yours is that I'm on PHP 7.1 and you are on 7.0. I'm not aware of any issues specifically with class_alias in 7.0, but it was a pretty buggy release, and was very quickly superceded by 7.1, and I never recommend anyone uses 7.0.
So my only suggestion right now is update to PHP 7.1.
-- hugh