I am having issues with VPN and UPnP.
I need to know if there is a firmware update for this router to resolve these issues.
Hardware Version: Tp-Link Archer C1200 v1.0
Firmware Version: 1.0.0 Build 20180208 rel.59779 (EU)
The UPnP setting of the provided modem/router is working with the current firmware.
You may try to manually configure port forwarding on the modem for your NAS or to contact the NAS vendor for further assistance.