Lianauae Google AdSense approval isn't necessary to use EzoicAds, however we can't work with a site that has been disapproved by Google AdSense unfortunately as we are a certified Google Publishing Partner and subsequently need to abide by their rules.
In terms of your ads.txt file, it looked like it wasn't set up just yet, so I've moved this along on my end for you. Google should crawl it in the next 72 hours, if you're still seeing this message after this time please let us know and we'll take another look for you! 🙂