Identify the issue

The “Website redirects are losing click data” error appears when your redirects aren’t passing along your GCLIDs (Google Click Identifiers). When a user clicks on your ad, a GCLID is attached to the URL to help measure if the user converts. If the landing page redirects the user to another page but doesn't also pass along the GCLID, the user's click won't be associated with any future conversions.

Fix the issue

There is server-side code that is negatively affecting your measurement as a result of redirect behavior. You will need to identify what isn’t working properly on your server and have it fixed by your IT personnel so that the GCLID isn’t removed from the URL to allow the conversions to be tracked.