Newbie Conundrum I hope...

[rayspages.xyz]

Hi.
Im trying to connect my Printful store on my new Prestashop account (and find my way around at the same time).
Everything was going fine until today.
Printful randomly becomes unsynced and today I cant get them to connect.
I get my log in screen which informs me its unsecure and to use the blue link above. See attached image.
This links me to my page but then the page stays blank.

Here's the link: https://rayspages.xyz/admin123/index.php?controller=PrintfulConnectReturn&token=baa529e9d691eabe7c269eda5bbe6a5e

Then, If I remove the wording after admin123, it takes me back to my dashboard but printful isn't loaded.

If you could help me to sort this out it would be great. I was hoping to be loading up with content and new images to day but I'm stuck at the starting post

Cheers

Ray