Fatal Error – product-added-to-cart.php:26

Hello Olga,
We cannot replicate the error directly, and it occurs only a few times per day.
We cannot disable all plugins, because our production site – where the errors occur, depends on them for its operation. We do not have any caching plugins – the only caching on the site comes from WPEngines, and the associated Cloudflare CDN.
It seems that this error is coming from XStore – can you track it down in another way??
Best regards,
Ben

Hello Olga,
I have pushed a fresh copy of the site to our staging site. Admin credentials and sftp info is in the private content area.
I will not change anything on that staging site until I hear back from you.
FYI, there is no WPEngine or CDN caching on the staging site.
Your assistance is much appreciated!
Regards,
Ben

Thanks for the update! I’ll stay tuned.
Ben

Unfortunately, I do not know what is causing this error and am not able to replicate it. It has been showing up a couple times a day, on most days, under the store traffic we have on the site.
I notice that you must have cleared out our logs on the production site, and the error has not yet recurred. Did you make any other changes??
At any rate, I’ll watch for the error, and perhaps get some help from wpengine, our hosting company, to explore whether there might be a cacheing exclusion needed related to this problem.
Thanks again for your help trying to track this down.
Regards,
Ben

Thank you. I will keep an eye out and see if I can get to the bottom of this. I am deactivating admin access for now.
Regards,
Ben

Hello,

We are still being plagued by this fatal error. Can’t duplicate it, happens several times on most days.

We have investigated more, the error is definitely related to the popup form of the Product Added Notification Type. If we use one of the other types of notification, this error does not occur. We really like this Popup form of Product added notification, and would really like to have it fixed. I understand it is difficult because it is hard to duplicate.

The alternate form of notification, “Open cart Off-canvas/dropdown content” might work for us, but it has an issue, too. It works fine in mobile, with a slide-out that must be dismissed. But on desktop, the mini cart appears briefly, but disappears after a few seconds. Can it be made to persist on desktop, or better yet, just use the mobile form on desktop too?

Finally, the 3rd form of notification, “Alert” would be a worst case implementation for us. Can you suggest the CSS needed so that we can set the color of the notification to match our site, which uses Orange color #e36e1e for such things?

We appreciate your help in tracking this down. We suspect we’re not the only one having this problem. It would sure be great to solve it??

Thanks in advance for your continued help.

Ben

Hello Olga,

Thanks for getting back to me.

1) As I have explained, I am not able to duplicate this error. If it is product related, I can’t tell which one. It seems to occur randomly several times per day on our production site. You suggested earlier that it might be a cacheing issue. Can you suggest a cacheing exclusion I might want to have WP Engine add to the site?

2) We are definitely NOT experiencing behavior as shown in your demo regarding the slideout add to cart option. I have configured our staging site that way and am providing credentials in the private area so you can have a look.

3)The styling CSS works for Alert version of add to cart notification. But this is not the desired choice, for sure. We really like the popup version, just not the fatal errors that come with it.

Thanks again for all your support, we can count on 8theme to help us with problems we might experience.

Regards,
Ben

Hello,
Thanks for your response.
1) See earlier in this thread. We do not use any 3rd party cacheing plugins on the site. The only cacheing is provided by WP Engine, our hosting vendor. If you might suggest a needed cacheing exclusion around this error, I can have them put it in place for us. I am sorry I cannot provide instructions for duplicating this error, but I do know it is happening regularly when the popup notification is turned on. From yesterday’s fatal error logs on the production site:

2022-06-07T19:15:30+00:00 CRITICAL Uncaught Error: Call to a member function is_visible() on null in /nas/content/live/borregooutfitt/wp-content/themes/xstore/woocommerce/product-added-to-cart.php:26
Stack trace:
#0 /nas/content/live/borregooutfitt/wp-content/plugins/woocommerce/includes/wc-core-functions.php(345): include()
#1 /nas/content/live/borregooutfitt/wp-content/themes/xstore/framework/woo.php(1888): wc_get_template(‘product-added-t…’, Array)
#2 /nas/content/live/borregooutfitt/wp-includes/class-wp-hook.php(307): etheme_added_to_cart_popup(”)
#3 /nas/content/live/borregooutfitt/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(”, Array)
#4 /nas/content/live/borregooutfitt/wp-includes/plugin.php(474): WP_Hook->do_action(Array)
#5 /nas/content/live/borregooutfitt/wp-admin/admin-ajax.php(202): do_action(‘wp_ajax_nopriv_…’)
#6 {main}
thrown in /nas/content/live/borregooutfitt/wp-content/themes/xstore/woocommerce/product-added-to-cart.php on line 26

2022-06-07T19:19:25+00:00 CRITICAL Uncaught Error: Call to a member function is_visible() on null in /nas/content/live/borregooutfitt/wp-content/themes/xstore/woocommerce/product-added-to-cart.php:26
Stack trace:
#0 /nas/content/live/borregooutfitt/wp-content/plugins/woocommerce/includes/wc-core-functions.php(345): include()
#1 /nas/content/live/borregooutfitt/wp-content/themes/xstore/framework/woo.php(1888): wc_get_template(‘product-added-t…’, Array)
#2 /nas/content/live/borregooutfitt/wp-includes/class-wp-hook.php(307): etheme_added_to_cart_popup(”)
#3 /nas/content/live/borregooutfitt/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(”, Array)
#4 /nas/content/live/borregooutfitt/wp-includes/plugin.php(474): WP_Hook->do_action(Array)
#5 /nas/content/live/borregooutfitt/wp-admin/admin-ajax.php(202): do_action(‘wp_ajax_nopriv_…’)
#6 {main}
thrown in /nas/content/live/borregooutfitt/wp-content/themes/xstore/woocommerce/product-added-to-cart.php on line 26

2) Thanks for the instruction about the mini-cart setting for add to cart notification. We may have to change to this if we can’t get the popup issue resolved.

Regards,
Ben

Hello,
These occur only on the Live Site only, not on staging. Of course, staging does not have the same traffic as production.

As I have said over and over, I cannot tell you what products are causing it or if it is just random. That is my answer to your question. Previously, you had access to the production site and were not able to duplicate. I did have it happen to me on the production site (the popup froze) and the error appeared, but when I reloaded and tried again with the same product, it was added just fine.

As you can see from our fatal error logs, this is occuring each day.

I think it may be related to cacheing. So, I will ask again: can you tell me a cache exclusion we should add that might effect the process or code that is running when the add to cart popup appears??? Or when this fatal error is generated?

Thank you.

OK, trying to work with these suggestions.

Can you tell me the file path to “PHP session_path” so I can check?

WP engine has added these caching exclusions:
arg: etheme_added_to_cart_popup
path: ^/cart/?

Do those look like they might worK?

Sorry, my technical skills are limited.

Hello,
Well I did that, and my question came from them. Maybe there was a communication problem on my part.
Anyway, since you have access for my other request re: autoload templates, perhaps you could look and tell me the path??
And the cacheing exclusions??
Thanks you.

Hello,
Thank you, I’ll take a look and see if anything here helps.
Regards.