It would be great if KMyMoney would be able to import camt.052.001.06 files. The format is "documented" at: https://www.iso20022.org/payments_messages.page My bank does not offer OFX export, but only variants of "CAMT", which turns out to be camt.052.001.06 according to the xmlns.
I don't know if it is browser dependent, but I get an error with that link - it looks like the web site added some parameter(s) to the URL, which it then doesn't like. I can easily get to the main page of the site, but don't know if you were trying to point to something more specific. Perhaps if you post the title of the target page, others can just search for it on the site.