Check if your website robots txt file is active by Webnurse | Fiverr
robots.txt Tester showing not found (404) although robots.txt file exists - Google Search Central Community
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Why Google robots.txt Tester has error and it's not valid - Stack Overflow
Robots.txt - Moz
How to solve the problem of sitemap contains URLs which are blocked by robot .txt in google search console in Prestashop 1.7.x after upgrade from previous version? - Genkiware
SOLVED: Google Search Console Reports: Crawl Blocked by Robots.txt | Up & Running Technologies, Tech How To's