main_page=shopping_cart page showing HTTP ERROR 500

[oavs]

Problem is intermittent.
Sometimes goes to checkout sometimes shows the error page (same product or different regardless)

Not sure which files I should check?

Can anyone please advice?

Cheers

Site : http://premiersalon.com.au/index.php...8#.XZvMsEYza1u

Or search for a product "Professional Salon Kit - $1250.00" it finds it but when you add to cart next page shows the error.
=======================
This page isn’t workingpremiersalon.com.au is currently unable to handle this request.
HTTP ERROR 500
====================

[lat9]

99.9999% of the time, a Server 500 means that there's a myDEBUG*.log file in the site's /logs directory identifying the source of the error.

[oavs]

Here is the log
=======================
[08-Oct-2019 20:34:18 Australia/Brisbane] Request URI: /products_all.html?disp_order=1&page=15, IP address: 54.36.148.144
#1 include() called at [/home/premiers/public_html/includes/autoload_func.php:60]
#2 require(/home/premiers/public_html/includes/autoload_func.php) called at [/home/premiers/public_html/includes/application_top.php:170]
#3 require(/home/premiers/public_html/includes/application_top.php) called at [/home/premiers/public_html/index.php:26]

[08-Oct-2019 20:34:18 Australia/Brisbane] PHP Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in /home/premiers/public_html/includes/classes/usu.php on line 1015
[08-Oct-2019 20:34:18 Australia/Brisbane] PHP Fatal error: Uncaught Error: Call to undefined function mysqli_close() in /home/premiers/public_html/includes/classes/db/mysql/query_factory.php:131
Stack trace:
#0 /home/premiers/public_html/includes/classes/db/mysql/query_factory.php(136): queryFactory->close()
#1 [internal function]: queryFactory->__destruct()
#2 {main}
thrown in /home/premiers/public_html/includes/classes/db/mysql/query_factory.php on line 131

[lat9]

The second log, anyway, indicates that you're using a down-level version of USU (https://www.zen-cart.com/downloads.php?do=file&id=132), currently at v3.0.2.

[oavs]

That was quick. thanks. So I will update this mod today. Hope it will fix this blank page issue.
Thanks again for super response when I really needed it :-)

[oavs]

I had to manually remove old version of the Ultimate URLs as the link at
Note: If you are upgrading from a version of USU prior to v3.0.0, follow the steps outlined here to remove previous versions' changes to Zen Cart core-files, then proceed to Installation and Upgrades.

Problem still exists.. strangely I am not getting any error logs either.

Changing theme to "Responsive" zencart theme also still gives the same error.. what does that tell you?

.. page resulted 404 not found.

[oavs]

"Note: If you are upgrading from a version of USU prior to v3.0.0, follow the steps outlined here to remove previous versions' changes to Zen Cart core-files, then proceed to Installation and Upgrades." >>>> .. page resulted 404 not found.

[oavs]

Ok After updating some files I am getting now this log.
=====================
[09-Oct-2019 11:13:21 Australia/Brisbane] Request URI: /dpu_ajax.php, IP address: 14.202.99.123
#1 each() called at [/home/premiers/public_html/includes/classes/dynamic_price_updater.php:188]
#2 DPU->getSideboxContent() called at [/home/premiers/public_html/includes/classes/dynamic_price_updater.php:59]
#3 DPU->getDetails() called at [/home/premiers/public_html/dpu_ajax.php:16]

[09-Oct-2019 11:13:21 Australia/Brisbane] PHP Warning: Variable passed to each() is not an array or object in /home/premiers/public_html/includes/classes/dynamic_price_updater.php on line 188

[mc12345678]

Ok After updating some files I am getting now this log.
=====================
[09-Oct-2019 11:13:21 Australia/Brisbane] Request URI: /dpu_ajax.php, IP address: 14.202.99.123
#1 each() called at [/home/premiers/public_html/includes/classes/dynamic_price_updater.php:188]
#2 DPU->getSideboxContent() called at [/home/premiers/public_html/includes/classes/dynamic_price_updater.php:59]
#3 DPU->getDetails() called at [/home/premiers/public_html/dpu_ajax.php:16]

[09-Oct-2019 11:13:21 Australia/Brisbane] PHP Warning: Variable passed to each() is not an array or object in /home/premiers/public_html/includes/classes/dynamic_price_updater.php on line 188

That's related to dynamic price updater. Not sure, but may also be an old version of the software. The each usage was replaced with a foreach loop.

Please be sure to update all of your plugins to the current version because if they have recently been modified they should be compatible with the current version of Zen Cart

[lat9]

"Note: If you are upgrading from a version of USU prior to v3.0.0, follow the steps outlined here to remove previous versions' changes to Zen Cart core-files, then proceed to Installation and Upgrades." >>>> .. page resulted 404 not found.

Here's the correct link: https://github.com/lat9/usu/blob/mas...ade_from_v2.md