Broken back end in VM (prev. "Product Categories: Do not store" is this normal?)

[dslove]

Hi all, I'm afraid I need your input on the below situation (please see attached).

Is this normal?
Also, I cannot save any changes to the categories OR the images of   the products!

Any changes I try to make (or even create a new product), I get a "Duplicate entry 'xxxx-0' for key 'virtuemart_product_id'" message

Joomla 3.8.13
VirtueMart 3.4.2
PHP 7.1.24

Topic subject has changed.

[GJC Web Design]

new site?
old site?
migrated site?
upgraded site?
modified site?
table updater run?

[dslove]

new site?
old site?
migrated site?
upgraded site?
modified site?
table updater run?

So sorry about this GJC,

Updated from J! 3.8.10 and VM 3.2.14, no change in PHP version.

I just did a rollback though and I'm noticing that the VM back end looks weird in the Edit Product/New Product page.
Instead of sitting inside tabs, everything is in one long page and the categories field is blank and really long.
Also, all the tabs from the left-side VM menu are open.

Please see attached screenshot, it looks like some JS/Ajax issue.

Anything you've seen before?

[dslove]

Also, yes I ran the "Update Tables" script from the VM Database tools (twice).

[GJC Web Design]

the backend shot is a classic VM admin with JS error

so u need to track down this in the browser console

[dslove]

Ok, so this issue has appeared in all 4 of my active VM installations.

Please see attached for console message.
Any ideas? Have you come across this before?

[GJC Web Design]

try switching to the admin hathor template to see if related...

I have had problems with Isis on some installs  -- think I normally reinstall and make sure all caches  cleared

[dslove]

That was actually my next thought, so I tried Hathor but sadly without any success.

I reinstalled Isis, I reinstalled all core files but still no improvement.

I'm currently testing for conflicts with JS from other extensions, so I'm disabling Acymailing, K2 a.o. but it's not looking promising 

[Studio 42]

Why you have fancybox loaded from a CDN?
This is the first to remove.

[dslove]

Why you have fancybox loaded from a CDN?
This is the first to remove.

Thanks for the tip Studio 42. Is there such an option for the VM back end?
Under the "Templates" tab I only see Front-End related options.

[dslove]

Ok, so I found the culprit.

It's Simple Image Gallery Pro, and more specifcally, the Button - Simple Image Gallery Pro plugin (version 3.5.0), which calls the remote script https://cdn.jsdelivr.net/npm/@fancyapps/fancybox@3.5.0/dist/jquery.fancybox.min.js in the back end. Disabling the plugin resolves the issue.

Thank you all for your time!