Buy Furni Error [SWIFT]

Hello, I have an error that is really getting on my nerves and I can't fix it atall...

The error:
When I go-to buy a Furni out of the Catalog it just shows this when I click buy; Screenshot by Lightshot
This happens on all pages, BUT ONLY FOR ME?! all other users can buy furniture happily just not me, and being an owner I kind of need it.

Thanks in advance.