Hi there @Diego_Oliveira
So i’m going to link this
For some settings in Admin Panel that you need to turn on.
Also under
Setttings > Advanced Settings > Enable email confirmation (This needs to be turned on as well)
When it comes to the error for SendGrid, make sure you have installed the package
And configured it correctly, the error seems that you haven’t given the right API key or the key does not have the right permissions. So this needs to be checked with SendGrid