Are you still experiencing this issue? I was able to successfully add many products to my cart.
If you are, please let me know the following:
Thanks for clarifying! I am unable to replicate this error.
If you can please provide a screenshot of what you see on your end and answer the questions listed above, I can look into this for you further!
Are you still experiencing this issue? Happy to have a closer look at this for you! Just let me know the answers to my questions above!