My REST API (built on Wordpress) can't parse the hashtag (#) symbols in /fetch_tracking_numbers.
The order names end up returning an empty array. The server's URI ends at the first symbol
How can I read these order names in the URL?
Shopify doesn't trim any information from the URL when you hit the fulfillmentservice endpoint. It's really hard to say what's wrong here with this amount of information — but if you're not already, you should be making these requests from a backend service.