I followed the instructions and same result as @taste said here. I think we have to wait for the next update to resolve this issue properly.
For the time being I had to comment out agreeRegistrationTermsPage from /extensions/igniter/user/components/account/register.php 101-117
Also, had to get rid of newsletter component from the footer. Register page and others are working just fine now, but will look forward to the fix in the next release as I want to use the newsletter component on the website 😀 😄