Santiago

The problem was fixed by updating the WordPress version
Thank you

Tis is my list of plugins:

AddQuicktag
Adrotate
Advanced Ads
Advanced Custom fields
AMP
Any Mobile Theme Switcher Pro
Classic Editor
Entradas leacionadas por taxonomía
Imagify
Improved Cron
Mailpoet 3
One Signal Notifications
Quttera Web Malware
Reading Time wp
Really Simple SSL
Schema & Structured Data for WP & AMP
Site Kit by Google
Smash Balloon Instagram Feed
Web Stories
WPS Hide Login
Yoast SEO
Yoast SEO: News

Also when entering the web (donostitik.com) it opens normally but when clicking on a link it opens in a new tab and appears within a white frame (the original web has no borders), I don’t know if this could be due to the pwa plugin.

I’ve used:

if ( function_exists( ‘is_amp_endpoint’ ) && is_amp_endpoint() === false ) {
// Excluded content
}

And seems to work

Perfect!

That was the problem, it’s already solved

Thanks a lot!