I think the problem on that website is subtly different from that described by @yaute74 . It appears that it suffers from the problem of an automatic page reload when a language setting is changed (per the similar problems in Infinite page loading loop when Kee auto-fills a login form).
This is the entry that I got when I saved it through Kee:
It’s a mess of hacks and noise that suggests a painful development history for the code behind that website but there’s only really one part of that which Kee struggles with so you can just delete the 2nd field (the one of type “select”) and you should find that it works fine after that.