From other community posts, looks like this is a common problem affecting multiple TP-Link models. A few times a day my internet connection is down with message disconnected please confiure your DNS manually. I have configured DNS manually and this error still coming up. I read somewhere that the issue may be due to slow upload bandwidth. My upload speed is very slow, less than 1mbps (on adsl2). This makes working from home impossible.
Model: archer vr2600 hardware v1.0
Firmware: 1.5.0 0.8.0 v0050.0 Build 170425 Rel.35576n