Hello everyone, I am quite new to TP-Link. Hope the community could reply and aid me in some troubleshooting. 

These are the TP-Link hardware I have right now

1) ER605 v2 VPN Router

2) TL-SG1016DE 4.0

I have two VLANs, VLAN 1 (for normal configuration) & VLAN 15 (for mgmt network).

Currently VLAN 15 has a LAN network (10.95.0.1/24) with DHCP tagged to port 4 & 5 on the ER605 router, I am able to ping machines and resolve an IP address from both port 4 & 5. Everything works properly on the same router LAN over VLAN 15. 

On TL-SG1016DE, I have configured VLAN 15 on port 13 & 14. Port 13 being the trunk which I have configured it as "Tagged with PVID of 15" and Port 14 being "Untagged with PVID of 15". However, when trying to connect ER605 port 5 to port 13 of TL-SG1016DE, machine connected to port 14 couldnt resolve IP address from the router's VLAN 15 network (10.95.0.1/24), neither could I ping the gateway of VLAN 15. The VLAN 15 on the router side is set to tagged.

Please help and appreciate the advice if my configuration or logic is wrong! Been trying to troubleshoot for hours but to no avail. 

Thanks in advance