Why doesn't registration work in Joomla 3.9.3 (404:VirtueMart)?

Question

Joomla

Good day. I am getting acquainted with the Joomla engine and out of stupidity I installed a bunch of mods like VirtueMart, jComments, HikaShop, JoomShoping, SLogin. While playing with stores, I realized that Virtue was too complicated and removed it. After that, the standard authorization form (when the "registration" button is pressed) refers to 404: /component/virtuemart/?view=user

Something also happened with SLogin, registering through this module redirects /component/users/login?Itemid=101 where instead of content extended standard authorization form with the message "Please, first pass authorization." If there is an account with such an email, then he offers to connect and logs into the account without problems. But the new user cannot be created.

What is the problem here? Why is it displaying 404:VirtueMart instead of the registration page? And it's still not clear why SLogin stopped working.

Answer 1

Go to the Extension Manager / Manage, type in the search for VM and delete everything left from Virtuemart. There will be a plugin that is responsible for the redirect

Answer 2

Always make a backup on all "successful points"!
Do not put anything new if you have not made a backup!
Now - put everything from scratch.