a dirty way :
go to file inc/class-lp-forms-handler.php
find this function -> public static function register_validate_field
remove this lines from function :
if ( ! preg_match( “#[a-zA-Z]+#”, $value ) ) {
throw new Exception( __( ‘Password must include at least one letter!’, ‘learnpress’ ), 120 );
}
if ( ! preg_match( “#[A-Z]+#”, $value ) ) {
throw new Exception( __( ‘Password must include at least one capitalized letter!’, ‘learnpress’ ), 125 );
}
if ( ! preg_match( “#[0-9]+#”, $value ) ) {
throw new Exception( __( ‘Password must include at least one number!’, ‘learnpress’ ), 125 );
}
if ( ! preg_match( ‘#[~!@\#$%^&*()]#’, $value ) ) {
throw new Exception( __( ‘Password must include at least one of these characters ~!@#$%^&*() !’, ‘learnpress’ ), 125 );
}