Editing a Mautic custom block while authorization is denied breaks the page

Problem/Motivation

Editing a Mautic custom block while authorization is denied breaks the page

TypeError: Mautic\MauticApi::newApi(): Argument #2 ($auth) must be of type Mautic\Auth\AuthInterface, bool given, called in /var/www/html/docroot/modules/contrib/mautic_paragraph/src/MauticParagraphConnector/MauticParagraphConnectorPluginBase.php on line 238 in Mautic\MauticApi->newApi() (line 64 of /var/www/html/vendor/mautic/api-library/lib/MauticApi.php).

Steps to reproduce

Create custom block with mautic form. If authorization to mautic fails, try to edit such block.

Proposed resolution

Check if $auth is not null.