Upgrade to 1.5.6 failure

[agile4]

I upgraded my site from 1.5.4 to 1.5.6c and am now totally dead. I did this through the Softalicious app inside cPanel on my host.
After the upgrade, it took me to page telling me to run the zc_ install file. It took me to a page that said I needed to be on PHP 7.2. I had my host change that and things when to hell.
I now try to run zc_install and get nothing. Blank screen.
My host has loaded backup versions and same issue.
I've run db_check and db_repair and that looks good.
Right now, we've back the php setting to 5.6
I'm really lost here. I have a feeling that it's some sort of issue with the database, but not sure.
Any help on what steps to take?
thanks
Tom

[lat9]

I upgraded my site from 1.5.4 to 1.5.6c and am now totally dead. I did this through the Softalicious app inside cPanel on my host.
After the upgrade, it took me to page telling me to run the zc_ install file. It took me to a page that said I needed to be on PHP 7.2. I had my host change that and things when to hell.
I now try to run zc_install and get nothing. Blank screen.
My host has loaded backup versions and same issue.
I've run db_check and db_repair and that looks good.
Right now, we've back the php setting to 5.6
I'm really lost here. I have a feeling that it's some sort of issue with the database, but not sure.
Any help on what steps to take?
thanks
Tom

A couple of things:
1. Softalicious installs have been "problematic" in the past.
2. There is no such release as 1.5.6c; the most recent released version is 1.5.6a.

[agile4]

OK. 1.5.6a.
So, any suggestions on how to fix this? I feel that is I could update the dB, it might solve some problems, but I can't get zc_install to run.
Tech support has restored a couple of older backups of my site and no change
Tom

[agile4]

I poked around and found this in a log folder. Does this help?

[31-Mar-2019 00:12:02 UTC] PHP Notice: Undefined property: queryFactory::$dieOnErrors in /****/*****/******/legacyleathercraft.com/includes/classes/db/mysql/query_factory.php on line 262
[31-Mar-2019 00:12:02 UTC] PHP Notice: Trying to get property of non-object in /****/*****/******/legacyleathercraft.com/zc_install/includes/classes/class.systemChecker.php on line 232
[31-Mar-2019 00:12:02 UTC] PHP Notice: Trying to get property of non-object in /****/*****/******/legacyleathercraft.com/zc_install/includes/classes/class.systemChecker.php on line 235
[31-Mar-2019 00:12:02 UTC] PHP Fatal error: Call to a member function MoveNext() on boolean in /****/*****/******/legacyleathercraft.com/zc_install/includes/classes/class.systemChecker.php on line 243