Clicking the insert new product button results in plus icon going to a circling arrow icon. However it is avoided by rapid multiple clicks. It's weird as this is the only doing something action were this behavior is encountered and I'm providing what works for me if somebody else encounters this.
The situation is a single click on the insert new product button results in plus changing to a continuously rotating arrow. It stays in this status for ever as I just let it do this for 60 minutes to see if it clears. It doesn't. If you start rapidly clicking the insert new product icon after it changes from a plus to the rotating arrow there is no popup of the add (insert new product) frame (panel).
However clicking on the insert new icon and immediately going into a sequence of rapidly clicking while it's still a plus icon takes me almost immediately to the desired add product screen.
This may just be a weird isolated fluke situation for my PC and hosting server, but if somebody else encounters the same problem, they can try what I found works for me.
I've inserted over 50 new products, and the circling arrow icon issue does continue to happen if I do not click and then immediately proceed into rapidly clicking the plus icon for inserting new product.
Other than this I've not encountered any other weird functioning or glitch with my use and interface with abantecart.