GA not tracking

I followed the instructions for setting the AMP for WP plugin but it does not track the visits to the website by google analytics for the amp version of my website.
It shows the following errors at the website inspection console :
“Powered by AMP ⚡ HTML – Version 2012301722001 https://www.senderismoeuropa.com/amp/
DevTools failed to load SourceMap: Could not parse content for https://www.senderismoeuropa.com/ww.js.map: Unexpected token < in JSON at position 0
http://www.senderismoeuropa.com/:1

The resource https://cdn.ampproject.org/v0/amp-story-player-latest.js was preloaded using link preload but not used within a few seconds from the window’s load event. Please make sure it has an appropriate as value and it is preloaded intentionally.”

How could I fix it please?
Regards
Luis Carro Martin.

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