New Seller - Error when trying to list an item

[ste-954341]

This is my first time trying to sell an item and I keep getting this not helpful error message:

An error occurred while processing your request.

Reference #221.b2c0ce17.1749671896.143b0f06

https://errors.edgesuite.net/221.b2c0ce17.1749671896.143b0f06