I am using shaper_shopin Site Template version 2.0.2 On a test website I tried updating from Joomla 5.4 to Joomla 6. The Front-End is displaying this error message:

Error 0 idn_to_ascii(): Argument #1 ($domain) must not be empty [Go Back Home]

To be precise: The error occurs when using the URL without «index.php», such as «https://mywebsite.ch» The frontend is ok if we use «https://mywebsite.ch/index.php»

The file .htaccess is in the root direcory and in Global Configuration «Use URL-Rewrite» is set to «Yes». Before with Joomla 5.4 either URL variation was working.

Thank you and kind regards Chris