The link <https://vreqenz-stream.de/shop/> throws warning when opened on some devices and not on others.   

I thought it may be a cahce issue but I have cleared cache from WP-rocket and also browser. Just for the info I am using Plesk web admin tool.  

Below is my WP\_Config settings

```
ini_set('log_errors','On');
ini_set('display_errors','Off');
ini_set('error_reporting', E_ALL );
define('WP_DEBUG', false);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);

```

[![Site snipshot with warning on top](https://i.stack.imgur.com/lO9rz.jpg)](https://i.stack.imgur.com/lO9rz.jpg)