Wifi doesn't turn on

I get the message Enabling Wifi but it doesn't turn on.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 4
crwdns2934285:0crwdne2934285:0