React-template-editor: no preview, just error-message

Version ie <v5.10.30>

v5.11.61

Environment <Docker/Shared Hosting/Zip/Other>

Docker

Describe the bug

When trying to create a template I always get this error-message:
invalid data access

An exception has been thrown during the rendering of a template ("Twig\Extra\Intl\IntlExtension::formatCurrency(): Argument #2 ($currency) must be of type string, null given, called in /var/www/app/vendor/twig/twig/src/Environment.php(421) : eval()'d code on line 193") in "__string_template__82f9949e58044b69af5ce04434d2db7b" at line 91.</small>

Steps To Reproduce

Just start creating a new template.

Expected Behavior

No error, but a nice preview.

Screenshot

Hi,

Do you see a difference in the desktop app?

Desktop-app outputs this error-message:

422: Unprocessable Content • invalid data access

I suggest asking in a discussion on GitHub