Since the Microlink SDK consumes the Microlink API and turns the raw data into a beautiful preview, it needs to perform an internal request to obtain it from the target URL.
To do that, our integrations use the standard . However, Microlink SDK doesn't add it as part of the bundle: It will take it from window.
That means that window.fetch should be available and accesible.
Although nowadays the is good enough, you need to be sure that the environment Microlink SDK is running on has it available.
We recommend using the CDN for that purpose, it will only load the polyfill if window.fetch isn't globally detected.
Just add the above to your main markup before the closing body tag.