X-robots tag causing no index issues

[Donsimong]

I have an interesting problem with a site which has an x-robot tag blocking the site from being indexed, the site is in Wordpress, there are no issues with the robots.txt or at the page level, I cant find the noindex anywhere.

I removed the SEO plug-in which was there and installed Yoast but it made no difference.

this is the url: https://www.cotswoldflatroofing.com/

Its coming up with a HTTP error: x-robots tag noindex, nofollow, noarchive

[GastonRiera]

Hi Simon,
I hope you are well.

Is that an error you're getting in Search Console?
I'm checking your site, and I can't replicate that issue you are having with x-robots.
I have tried with Screaming Frog and my command line. None of them returned noindex. In the image attached, you'll see what I got.

Also, I tried a site: search, and your website is indexed. You have only one page, is that correct? 
Other image attached

Hope it helps.
Best luck
Gastón

v1hgAFP Ktkoit7