Hi Community.
Update - I just spoke to our technical team regarding the issue that is causing the "Provide a valid value for <WeightMajor> and <WeightMinor>." API error to be returned, and we are hoping to have a fix in place for this problem within about an hour. Therefore, if you have listings that are currently failing as a result of this error, I recommend trying to post them in a little over an hour.
On a separate note, our technical team is also working to resolve the issue that is causing the preview to incorrectly show shipping as "Local Pick-up Only". We expect this issue to be resolved a bit later today as well, and I will post further updates to this thread when additional information becomes available.
Thanks for understanding.
-Mike