This error gettings by our mercari.com customers as of 01.10.2020.
Why are you getting this error probably?
Sometimes errors like this can occur when Mercari.com updates its site. You are getting this error due to mistakes made by their development teams.
How to resolve this error?
This error has nothing to do with PrimeLister. Now try to add any of your products by making a copy-listing, you will get the same error. When Mercari.com resolves the error, your error will be resolved without any update.
Updated article at 04.10.2020
Mercari.com technical team solved the problem. Bugs fixed. If you are still getting an error please logout and login again. Sometimes chrome cache the old mercari website version. You can use PrimeLister. Thank you for your understanding.