Fedex Smart Post Doesn't Work After Latest Upgrade

After upgrading to 4.8.1.SP1, FedEx Smart Post is no longer showing up as a shipping option for my customers. Not sure how that upgrade would affect it and it could just be a coincidence on the timing, but I have not made any changes to that shipping method and it worked before that upgrade.

What is the FedEx reply in the log in your admin panel? If service does not return shipping rates, corresponding shipping method will not appear on checkout page.

Ok I checked and it showed an error that the weight didn't meet the minimum of 1.0 lb, so I tested again with products over 1.0 lb and it showed. Thank you for that - now I know where to look in the future.

Ok I checked and it showed an error that the weight didn't meet the minimum of 1.0 lb, so I tested again with products over 1.0 lb and it showed. Thank you for that - now I know where to look in the future.

Glad to hear that you found the solution :)