Mobotix live app: Access camera behind apache proxy

Hey, I have a question regarding the Mobotix Live app (Android):

When I create a port forwarding in my router from some port to port 80 or 443 of my camera’s IP, it works totally fine to enter my dyndns address + the forward port in the Live App.

But I configured a proxy on my server in apache2 and want to access the camera through it. When I open the configured url in a browser, everything works totally fine (also on my phone).
But when try to enter the url in the Mobotix Live app, it does not work.
I tried with both http and https, this is my configuration:

<VirtualHost *:80>
	ServerName <mysubdomain.domain.de>
	ProxyPass        / http://192.168.1.10/
	ProxyPassReverse / http://191.168.1.10/
</VirtualHost>

<VirtualHost *:443>
	ServerName <mysubdomain.domain.de>
	SSLEngine On
	SSLCertificateFile /etc/letsencrypt/live/mobotix.htfs.de/fullchain.pem
	SSLCertificateKeyFile /etc/letsencrypt/live/mobotix.htfs.de/privkey.pem
	SSLProxyEngine On
	SSLProxyVerify none
	SSLProxyCheckPeerCN off
	SSLProxyCheckPeerName off
	SSLProxyCheckPeerExpire off
	ProxyPass        / https://192.168.1.10/
	ProxyPassReverse / https://191.168.1.10/
</VirtualHost>

Does anyone have an idea what I could be missing?
Thank you very much in advance!

Same here with traefik reverse proxy.