@aq18507 I had a quite weird network problem on a Pi the other day, perhaps you have the same problem. Some other package pulled in connman as a dependency which - for some reason - after a while assigned an IPv4LL address to an adapter that was already connected, which then blocked all external traffic. Try to remove that package just in case you have it installed by running sudo apt purge connman and check the problem is fixed after a reboot.