I Had the same problem but there is a simply fix. when you reach iCloud.com and are faced with the set up iCloud options, click the options button on safari (I.e the page with an up arrow coming out of it. Not sure of the technical name for this button but it is usually used to print or forward web pages, pictures etc) and click the 'request desktop version'. This will refresh the page as if you are connected via a Mac or PCs and you can log in as normal.
You may need to unhide the 'request desktop version' button. This is done via the option button (see above), scroll through the list of grey options at the bottom usual starting with print then copy etc. Until you reach the more button. Select this and the request desktop version is there. Once selected it is elevated to a higher rank and appears in the list of options along with print copy etc.