I emailed Walmart Customer Care about the problem. This is their reply.
"We apologize that you experienced problems with our website during your visit to Walmart.com. We strive to provide our customers with the best online experience possible. Please be assured that we are working as quickly as possible to get our site up and running smoothly again.
Please call us at 1-800-966-6546 so we can assist you in placing your order.
Best regards,
Walmart.com Customer Care"
It seems to be that, at least, they are admitting there's a problem.
I emailed Walmart Customer Care about the problem. This is their reply.
"We apologize that you experienced problems with our website during your visit to Walmart.com. We strive to provide our customers with the best online experience possible. Please be assured that we are working as quickly as possible to get our site up and running smoothly again.
Please call us at 1-800-966-6546 so we can assist you in placing your order.
Best regards,