TL-MR6400 no internet on chromecast 2
My recently bought tl-mr6400 ( v5.3 000002j works fine as a 4g router. Can connect to its WiFi with iPhone and iPad. So Internet is available.
The ISP of the sim (4g) is KPN, The Netherlands.
Than I connected a Chromecast 2 (NC2-6a5, of 2015) wireless to the router. Chromecast is connected via HDMI to TV.
Connection Chromecast to router itself succeeded. However... the Chromecast then gives 'no internet'.... Although at the same moment my other devices do have internet access via the same router. Also stated in the mngmt.dashboard: internet available + chromecast device connected.
Of course I checked '3 times' if everything is on same WiFi, sim has unlimited data etc. Have token also most logical steps as a not-specialist: router back to fabric settings, same for the chromecast, and tried guest network as well. But so far no result. Other options I didn't change cause not knowing their impact.
Someone an idea what might be wrong ?
1)Till very recent this chromecast was coupled to the same tv, connected via WiFi via ISP (Ziggo) modem (connect box). Worked fine for years,
2)Considered to buy a more recent Chromecast gen 3 or 4 , but not sure if that will help, my gut feeling is this no-internet issue will stay without changing 'some setting'...
thanks for your help!