networking – Windows 10 “dhcpsrv” for hotspot – No internet / disconnect

I want to setup a dedicated hotspot in Windows 10. The “share network” is activated and seems to work as well. However, when connecting to the created WiFi with my Phone (Android 10) it got stuck on “Obtaining IP address”. So I installed and setup dhcpsrv (2.5.2) and configured it to serve IP addresses on the Virtual Network created by the hotspot.

So now my phone gets an IP address, but will then shortly show “no internet connection” and then disconnect immediately, returning to the top and connecting again.

dhcspsrv.ini

(SETTINGS)
IPPOOL_1=192.168.137.1-254
IPBIND_1=192.168.137.1
AssociateBindsToPools=1
Trace=1
DeleteOnRelease=0
ExpiredLeaseTimeout=3600

(GENERAL)
LEASETIME=86400
NODETYPE=8
SUBNETMASK=255.255.255.0
NEXTSERVER=192.168.137.1
DNS_0=1.1.1.1
ROUTER_0=0.0.0.0

(DNS-SETTINGS)
EnableDNS=0
FORWARD=1.1.1.1

(TFTP-SETTINGS)
EnableTFTP=0
ROOT=C:Program Files (x86)dhcpsrv2.5.2wwwroot
WritePermission=0

(HTTP-SETTINGS)
EnableHTTP=1
ROOT=C:Program Files (x86)dhcpsrv2.5.2wwwroot
(86-05-44-F7-35-FB) # My phones mac address)
IPADDR=192.168.137.2
AutoConfig=09/04/2021 12:53:25
LeaseEnd=1630840259

Main Network adapter settings (with sharing)

Main network adapter settings

Virtual network adapter settings (created by Windows when creating the HotSpot)

Virtual network adapter settings

What do I need to do so my phone stays connected and can actually use the new Wifi?