Login form not working

I 'm having trouble with the login form. Clicking on Register or forgot username or password just brings you back to the home page. I'm running the latest version of JFBConnect and also Joomla 3.7 with SClogin. It seems one can register by google twitter and linkedin but not with a user name or password. Any suggestions? it was working fine before but not now??

www.torontohiking.com/
Halfway down the home page click the blue login button and then the Register button.

Searching tells me that the links should be these:
Registration: index.php?option=com_users&view=registration
Forgot:index.php?option=com_users&view=remind
Password reset: index.php?option=com_users&view=reset

How do I change what you listed above to these?

I turned off SClogin and set up the standard Joomla login module (#19) as suggested above. It behaved the same way as sclogin.

My login form is on every page. Clicking register or lost username/password all just return you to the home page. Registered users can login ok but they are taken to their profile page instead of staying on the page where they were. I'd prefer they stay where they were.

This was all working fine recently. The only thing I can think of that was done recently was an upgrade to Joomla 3.7 and an update in php from 5.5 to 5.6 as well as an upgrade to the Rocket theme gantry 5 version.

Edit; Just noticed that on my blog pages, if you click on the lock icon on the black toolbar, it shows the sclogin window with social media (Facebook not working as usual). But as suspected these links for register/forgot are not working. Sounds like a Joomla fault somewhere.

You put me on the right track -looking at Joomla itself. It seems a menu link to registration had gone missing. I have no idea how. But adding that registration link made everything work again including JFBConnect and SCLogin. So thanks again.