Broken Site Layout

Hello there,

I'm new to cs-cart.

Over the past day or two after installing, I've created my categories, products and started getting ready to sell.

However, I seem to have nuked the site now.

https://geartrader.net/index.php

Now all I see is the contents of 1 category at the top of the page (with broken thumbnails) instead of a homepage.

If I try to navigate to a url I already know, the site looks better, but still really messed up.

https://geartrader.net/index.php?dispatch=categories.view&category_id=291

Lastly, if I try to change the view of the products (tile, list view etc) then I get an error displayed.

"ErrorOops, something went wrong (SyntaxError: Unexpected end of JSON input). Please try again."

I'm starting to panic, I've spent nearly 2 days entering products etc and worry I have to start from scratch again.

I have tried to change themes, that didn't seem to help.

Any ideas or help would be greatly appreciated.

I may also be interested in hiring someone to shape the site into what I need.

thanks

Brad

Update.

Per someones past recommendation, I launched a cs cart demo and exported the layouts to xml.

I then loaded these into my store, replacing the files.

No change.

Update.

Per someones past recommendation, I launched a cs cart demo and exported the layouts to xml.

I then loaded these into my store, replacing the files.

No change.

Possibly new layout was added during import. Please check the Switch layout section

https://prnt.sc/JLh0y3vjHYRb