Pages Certification 'Certificate misses intermediates'

Hello,

I am attempting to certify my website (found here), I am using the Ubuntu App from the Windows store (so I can use Certbot).

The Crtification came from Lets Encrypt, and I have managed to get to the stage where we add the certification data to the custom domain (SEE HERE)

I believe my issue stems from a fault fullchain.pem…interestingly, however the privkey is identified as matching…

I guess my actual issue is removing the ‘Certificate misses intermediates’. The contents of the privkey.pem are found here. The contents of the fullchain.pem can be found here

Any help is greatly appreciated!

Cheers,
Zach // 2Veryicey