LastPass is a password manager that doesn't work seamlessly with Piano's login templates because it's looking for the name and also id attributes on form inputs, which we do not use by default.
You can add these attributes on the inputs to the login form in the Piano ID Login Page template which should enable LastPass to work, according to these requirements.
For example:
HTML
<input type="text" name="email" id="email"/>
<input type="password" name="password" id="password"/>