The master password can not be copied from the form nor fully visible

[ratnavis]

Just now installed the plug-in to try the master password feature. But I can not copy the master password from the form - mouse-over brings the "one-way" sign - nor the password is fully visible.

The error messages (at DEVELOPER debug level) are:
Did you remember to call setType() for 'password'? Defaulting to PARAM_RAW cleaning.
line 1395 of /lib/formslib.php: call to debugging()
line 322 of /lib/formslib.php: call to moodleform->detectMissingSetType()
line 228 of /lib/formslib.php: call to moodleform->_process_submission()
line 58 of /auth/basic/masterpassword.php: call to moodleform->__construct()

Notice: Undefined variable: toform in [WEBROOT]/auth/basic/masterpassword.php on line 70

Notice: Undefined property: stdClass::$count in [WEBROOT]/auth/basic/masterpassword.php on line 79

Server: Ubuntu 20.04.2 LTS
PHP 7.4.3
Plugin release: 2021073000

[ratnavis]

Missed earlier. I have these lines in my config.php:
$CFG->auth_basic_enabled_master_password = true;
$CFG->auth_basic_whitelist_ips = '0.0.0.0';