# 30139: URL not valid for link shortening

Log Type: APPLICATION

Log Level: ERROR

## Description

This error occurs when ShortUrl is enabled and one or more URLs in the message are invalid.

### Possible causes

URLs can be invalid for several reasons, the most common being improper encoding. Special characters must be correctly encoded, and every URL should include a valid scheme and host.

### Possible solutions

Make sure all special characters in URLs are properly encoded before use. Invalid URLs often result from unescaped characters that break parsers or violate RFC 3986

Examples:

Invalid: https://example.com/hola/mañana Valid: https://example.com/hola/ma%C3%B1ana (the character ñ must be percent-encoded)

Invalid: https://example.com/callback?token=abc123== Valid: https://example.com/callback?token=abc123%3D%3D (trailing = padding must be encoded)

Invalid: https://example.com/path%test Valid: https://example.com/path%25test (a raw % is illegal unless followed by two hex digits; %25 represents %)