How do I get access to my home network via VPN?

I like to use my local hard drive from the home network at home via VPN when I'm out and about. Now I have a new computer and try to access the local hard drive via VPN (Shrew Soft VPN Access Manager) like with my old laptop.
I get the message "VPN enabled", but no access to the remote home network and therefore no access to the hard drive. "But if I log in on site via WLAN, everything works fine.
Does anyone have any idea what to do?

Have you released the home network for your mobile phone?

Your home network may still have to be released for the new device.

I also had to have my mobile phone and laptop activated separately for my home network. This was done through our IT department.

OK. - To check whether you are correctly connected to your home network at all, test whether you can call up the configuration page of your router.

Because: "No access" can simply mean that you have no access authorization, although you are connected to your home network.

Thank you for your answer. No, and my cell phone has nothing to do with it. I try to access the home network from the outside via VPN with my laptop. As I said, according to the access manager, the tunnel is open, but I can't see the network or the drives.

Yes but the vpn will use something with the devices must be connected.

Thanks! How can I do that? When I call up the Fritzbox via the browser, the one located here appears locally.

Then you are not connected to your home network.
In other words: The VPN connection is not established.

If you are connected to a VPN network (the message VPN enabled indicates this) then not to your home network. 🤔

Otherwise you would reach your home router with fritz.box.
Also basically matches the statement

But if I log in on site via WLAN, everything works wonderfully.

But now it is difficult to estimate where exactly the dog is buried.
If in doubt, I would first check at home that the VPN settings of the mobile device match those of the Fritzbox (Internet => Approvals => VPN).