Upgrade caused error in index.php

[Bobbywires]

Jan 22, 2019 at 11:21 AM - While executing query 'SELECT aid, title, r.description, keyword, alb_hits, category, visibility, r.thumb, r.owner, depth AS level, lft, '0' AS pic_count
FROM categories AS c
INNER JOIN albums AS r ON r.category = c.cid
WHERE c.depth >= 0 + 1


ORDER BY ' in index.php on line 338 the following error was encountered:
1064 : You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 7

I'm using: MySQL Version   5.6.42-84.2

code where error occured: 
    $sort_order = cpg_album_sort_order('r.');

    // collect album info and album counts
    $sql = "SELECT aid, title, r.description, keyword, alb_hits, category, visibility, r.thumb, r.owner, depth AS level, lft, '0' AS pic_count
        FROM {$CONFIG['TABLE_CATEGORIES']} AS c
        INNER JOIN {$CONFIG['TABLE_ALBUMS']} AS r ON r.category = c.cid
        WHERE c.depth >= $CURRENT_CAT_DEPTH + 1
        $forbidden_set
        $lft_rgt
        ORDER BY $sort_order";

[phill104]

It is probably theme or plugin related. A link to your site always helps diagnosis.

[Bobbywires]

Link is http://bobbywires.com/stockdale/
Not using any plugins or custom theme
After update I was logged in as admin not I can't log in at all

[Bobbywires]

So I cleared the install logs and ran cpg_installer_stub.php choosing fresh install in an other directory which failed. When trying to run the install the mysql option was not available only mysqli

[ron4mac]

You didn't fully complete the upgrade process. I was able to complete that for you. Your site seems to be functioning okay now.

[Bobbywires]

This morning 1/22/19 pst My site was not working and was displaying and error about "serious DB error".
I took the site back to the original 1.5.18 and set the PHP back to 5.6
I have until march of 2019 to figure this out.
How did you "complete the update"

[Bobbywires]

OK its now working
I created a duplicate directory for a test.
Recreated the the upgrade and it worked perfect.
Renamed the directories and all is good running php7.2
I think the problem was I tried to upgrade using the version in red at the bottom of the cpg_installer_stub.php (developers)
Thank you for the support