Welcome to SNB!
So you have a subscription for VPN service from Surfshark.
Then you need to activate the OpenVPN
Client in the Voxel Firmware.
There is no GUI/web-page for that in the Voxel Firmware.
You can follow the advice of
@eibgrad and read Voxel's readme, and/or :
The Kamoj addon has support for Surfshark!
You then also get all kind of other features like kill-switch, faster VPN,
Surfshark servers sorted on ping time, VPN bypassing and much more.
You may want to join the kamoj addon beta testing to get access and try it out.
Browse this forum to find more details.
(Your attached picture shows settings from the Netgear GUI for OpenVPN Server and must be deactivated to run the Client.)
View attachment 38884