loginsite has two steps- one is countryselection- before arriving to loginsite. It seems to be obligatory to select country each time. Sometimes 1password will filling information on the loginsite - sometimes you must do it by selecting 1 password once more.
this is the page : https://mypages.verisure.com/login.html
1Password Version: 1Password Version 6.7 (670008) Mac App Store
Extension Version: 4.6.6
OS Version: OS X 10.12.5
Sync Type: dropbox
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