There may be occasions when you prepare a batch of Click Through URLs for upload and they work fine with your tracking code. However, when you actually upload these URLs to the platform, URL Builder appends its tracking code and therefore URLs won't resolve correctly.
What Causes The Issue?
This problem most commonly occurs when a URL has a pipe (|) or other special characters, because it can potentially break URL strings if the website is not enabled to properly read those special characters.
It's also possible that, when clicking on a destination URL directly from the platform, the URL may not resolve correctly depending on your server side settings. If this happens, you can replace the dynamic value track parameters in the URL with actual values and it should then resolve correctly. This method actually mimics the way in which URL will resolve when a user clicks on a live ad.
How To Fix The Issue
Please ask the web developer of the website in question to adjust the site's settings so that special characters such as the pipe (|) can be read correctly.
Alternatively, you can simply avoid the use of special characters in your URLs.