Profile: Support

What nopcommerce version do you use?

This error message means that Stamps.com can't generate the shipping label because you didn't configure ZIP code of your nop store.
Did you configure the shipping address of your store?

What nopcommerce version do you use?
Do you use live or sanbox?

I didn't see such error message before.
I know that Square wants to see https on your site.
Maybe it's a reason.
Answer me and I'll think again.

I found one answer from Square but I don't know if this solution helps you.
To resolve this issue you simply have to ensure that the Square profile and the website business address are the same. It's a new Square requirement that is catching people by surprise due to their lack of letting people know about that.

It was a bug.
I have fixed it in the release 1.19.
Thank you for report.

I did new release 1.18.
Try it.

I did new release with your two first requests.

Do you have the native nopcommerce kernel library?

Thank you for this ideas.
I'll add them in existing plugins.

Can you check the memory size at your server?

Enable STDOUT log for nopcommerce and try to install plugin.
Send me stdout log file to my email support@foxnetsoft.com

I have fixed this bug.
Replace plugin folder (DLL file and check it)

Thank you for report about it.

Check if this "bad shirts" are in another categories with value "Export -NO".
and if you use any filters/conditions.