robot.txt not valid

Hi there,

I’ve run a test of my website on https://web.dev/measure/ (Lighthouse) and it’s saying two errors:

Robot.txt file not valid
Links are not crawlable

I have noticed in the last couple of days Google isn’t crawling my new posts and I’m having to physically run them through Search Console to get it to crawl the page.

I thought that Rankmath handled the generation of my Robot.txt file?

Please help? This is for website ‘https://thirdeyetraveller.com’ and my site map is https://thirdeyetraveller.com/sitemap.xml

Thank you
Sophie