Your router’s IP may have been changed from 192.168.1.1 to something else.
Is your router a (using the Tether App) or an older one (web-only)?
Here’s an interesting, engaging post based on your query about 161.168.l.l and TP-Link routers:
Before starting, ensure your computer or smartphone is connected to the TP-Link network via Wi-Fi or an Ethernet cable. Unstable connections are the primary cause of login failures.
If you typed into your browser bar to access your TP-Link router, you likely encountered an error page. Internet protocol (IP) addresses are strictly numerical. The characters "l" (lowercase letter L) in that sequence are typos for the number "1" .
: The 161.x.x.x block belongs to public IP routing pools. Consumer routers are hardcoded to standard local subnets, which almost always begin with 192.168.x.x . Correct Local IP Addresses for TP-Link Routers
TP-Link routers are accessed via 192.168.0.1 192.168.1.1 tplinkwifi.net