Ads stopped working

Hello,
Today, I have noticed that Ads stopped working. On Saturday, I know that Ads was still there but now, it is not even showing up or only yellow background. I did not update or changed anything and it is not working now. So I tried to update the plugin, and still nothing.

Could you please help? something changes or what is happening?

Google AdSense is showing active, I did not changed anything there as well..

Thank you in advance

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