In the web standards, URLs with raw un-encoded Unicode are malformed, and not valid URLs, although most web browsers will accept them and clean them.
See
https://en.wikipedia.org/wiki/Percent-encoding
Percent-encoding, also known as URL encoding, is a method to encode arbitrary data in a Uniform Resource Identifier (URI) using only the limited US-ASCII characters legal within a URI.
The software that you copied the URL from should have encoded it before it goes on the clipboard, so there's probably a bug there. If you paste the URL into a web browser, and then re-copy it, you will see that it cleans up the encoding and makes it a valid URL. But the URL should be like that from the original source.