Wifi and Wifi101 examples are not working with library versions:
Wifi101 0.14.0
Wifi 1.2.7
"server" on line 5 should be replaced by "client".
Incorrect code:
1 if (client.available() > 0) {
2 // read the bytes incoming from the client:
3 char thisChar = client.read();
4 // echo the bytes back to the client:
5 server.write(thisChar);
6 }
After making the described change the chat server became very reliable!