Error 21: Invalid URL

PayMe's message with language: "en": Please verify URL validity

PayMe refused a URL in the request, and the whole call fails. generate-sale creates no sale. status_additional_info holds the URL.

Usual causes

• A local address in sale_callback_url or sale_return_url. In the sandbox, localhost in either field and a private address both failed with HTTP 500.
• A malformed address, or one with two schemes.

What to do

• When an address is local, leave the field out and log that you did. PayMe then uses the account's configured URL.
• To receive callbacks in development, use a tunnel. See Config and Transport.

The full list of codes is on Errors. If something else is going on, see Troubleshooting by Symptom.