I am also having this issue. I have tried several browsers, and another computer, cleared cache and cookies, uninstalled an reinstalled webGL, disabled and reenabled it, and reset my modem and my router. I have uninstalled and reinstalled Java. I've tried with a vpn and still it's not working. (my husband can log in fine, for those who will suggest it's our ISP)
I have 64bit windows ten running 16gig RAM with a 6gig graphics memory card, before someone goes that route.
I have been told to play it on my phone, but I have a Galaxy S7Edge.
I get this error:
Any help appreciated
Unity Error may fixed with this https://plarium.com/forum/en/vikings-war-of-clans/bug-reports/36978_can-not-log-on-after-android-update/?post=318448