Even after following all the steps recommended in the help section. I am using hotmail, never had an issue like this. Trying to login, it prompts to check my email, but I get no email from last pass.I am familiar with this security step, but I never had issue receiving the email from Lastpass. I see you had a similar incident on Mar 19, I really hope something similar is going on right now, because currently I am fully unable to access my account, and I am worried.
Please check if your end is working as intended sending emails to hotmail addresses.