Cannot add product after WP and Woocommerce update – JS errors

Hi guys!

Firstly, I want to say Well Done for this plugin and thank you for offering it to the world.

Now, down to the problem. The plugin was working fine. A few days ago I updated both WP and Woocommerce and after that everything seemed to work perfect until I tried to add a new product yesterday and it just didn’t do anything.
I looked in the browser console and I saw there are quite a few JS errors.
To be honest, I don’t know exactly if one or more of them were there before the updates, but I am certain that WCFM worked fine before, as I added a few products which were fine, so it makes sense that there is an incompatibility between the modules versions.

Here are my installed versions:
WP: Version 5.4.1
WooCommerce: Version 4.2.0
WCFM – WooCommerce Multivendor Marketplace: Version 3.4.0
WCFM – WooCommerce Multivendor Membership: Version 2.9.0

I attached 2 images for the Add product page result – one from a vendor user logged in and another one with the admin logged in, as there are different JS error as I noticed.

Note: as you might notice, on the one with the Vendor user logged in, the product form is submitted, but it returns with all the fields in the URL (GET).
I don’t know if that’s correct, but I presume it’s not, because when I tried to add a proper (a bit longer) product description, I got an error like “the URL is too long and cannot be processed”, so I presume that the form sends the data as POST, so that might be a helpful information.

In any case, I would be so grateful if you can look into this, as I am sure a lot of othere people that probably didn’t discover this problem yet or are struggling to figure it out.

Please let me know if I can help with anything or you need more information.

Thank you very much for your support.

Best regards,

Andy.