Add to Cart button is missing on all product pages

[viktor-zhuromskyy]

After successful upgrade from 2.0.9 to 2.1.1 the "Add to Cart" button is missing on all product pages in the entire store.

I am using latest Porto theme. Everything was working before the upgrade.
I suppose the issue is with the $isSaleable status attribute, but I can't find anywhere in DB where is the status recorded.

Nonetheless, category pages display the "Add to Cart" button as intended.

Please check https://endohaus.com

[paales]

@devdesco-ceo It seems there is a problem with the Porto theme not being compatible with Magento 2.1.1. The best course of action would be to contact the maintainer of the Porto theme.

[viktor-zhuromskyy]

Thank you! I will check in with the Porto developers. By the way,
what should be the code piece for addtocart.phtml in M2.1.1?

[viktor-zhuromskyy]

Actually,
I temporarily deleted addtocart.phtml from Porto theme folder for M2 to use it's native addtocart.phtml, but still the issue is present,
so I do not think it's Porto's compatibility problem.

[viktor-zhuromskyy]

I switched over to magento/blank theme, but the Add to Cart button is missing in this case as well.
Maybe when running database upgrade when upgrading from 2.0.9 to 2.1.1 broke some relations or settings in DB?

Any clue?

[veloraven]

@devdesco-ceo thank you for your report.
Please confirm that you have cleaned cache, reindexed, and re-generated statics.

[viktor-zhuromskyy]

Sure.
I am getting the following error message in console:
DOMException: Failed to read the 'contentDocument' property from 'HTMLIFrameElement': Blocked a frame with origin "https://endohaus.com" from accessing a cross-origin frame.(…)
May be that is the cause?

[viktor-zhuromskyy]

What I just discovered, is in my multi-store / multi-view setup of M2 (actually after update from 2.0.9 to 2.1.1 and afterwards to 2.1.2) only default store views with English locale do not have "add to cart" present on product pages, and functionality of checkout is broken on the same store views.

I tried to change default store views to another locales, but to no avail.

Please see yourself - https://endohaus.us/catalog/product/view/id/10/s/c-mount-video-coupler-for-storz-compatible-rigid-endoscopes-and-fiberscopes-vcc-bmw-35f-050 is missing the "Add to cart" button, but
https://es.endohaus.us/catalog/product/view/id/10/s/c-mount-video-coupler-for-storz-compatible-rigid-endoscopes-and-fiberscopes-vcc-bmw-35f-050 has all the shopping functionality present.

Also, I went through all settings in admin, and everything looks the same. As I guess, either there is an issue with en_US locale in config / locale files,, or something is screwed up in DB.

I am ready to spend my time and offer Team View session to one of M2 developers to get deeper into the issue right at my production host.

So, as I said before, it is not a compatibility issue of Porto theme, but a BUG in M2 2.1.x core.

[nomuprive]

@devdesco-ceo Thanks for sharing! Were you able to find a solution to this issue? I'm also having "Add to Cart" and checkout problem with Porto. A Magento Developer on here confirmed that Porto was causing the problem because the "Add to Cart" and checkout is working just fine with Magento 2 default theme. But it looks like our issues are not the same but a little crossing for one to suggest they might be related one way or the other. For me when I click on "Add to Cart" button it redirects to homepage causing a loop and the checkout process never complete. I contacted Porto Developers and they suggest making sure I use the patch, which I did several times, but still with no success.