Admin 500 Error

Hi guys

Woke up this morning not being able to access my admin. Login would not allow. Edited something and now I have a 500 error on admin.

[Sun Nov 27 08:26:58.521365 2016] [cgi:error] [pid 11194] [client 86.161.65.106:51914] AH01215: PHP Fatal error: Call to a member function isLogged() on null in /home/xxxxx/public_html/vqmod/vqcache/vq2-catalog_model_catalog_product.php on line 468: /usr/local/cpanel/cgi-sys/ea-php56

Tried deleting entire contents of vqcache. Didn't work. Checked config files for public and admin both seem to be correct.

HELP!

it is you vqmod/xml files you need to disable

for every file in vqmod/xml folder (apart from vqmod_opencart.xml) simply rename them all and add an underscore after the .xml extension

e.g. some_mod.xml_

Then empty your vqmod/vqcache folder

Also delete:

vqmod/checked.cache
vqmod/mods.cache

Now check your store - If all is OK, you can enable one by one your vqmod/xml files by removing the underscore

After enabling one, check your store again, eventually the error will er-appear.

You will then know that the last vqmod/xml file you enabled is the culprit.