Try to setup a web socket server with wifinina.

When I try the example Generic_WebSocketServer_WiFiNINA.ino the
websocket connection is always closed. I try to connect with different clients.
As far I can see the MKR WiFi 1010 should be supported since version 2.1.3.

It looks for me that the counting of the clients is not correct. I try to open only
one connection. See the log.

Wifi-version:
WiFiNINA firmware check.
Firmware version installed: 1.3.0
Latest firmware version available : 1.3.0
Check result: PASSED

websockets generic version: 2.2.2

[WS] 0 new client
[WS] 0 [handleHeader] RX: GET / HTTP/1.1
[WS] 1 new client
[WS] 0 [handleHeader] RX: Host: 10.X.X.X:81
[WS] 1 [handleHeader] RX: User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:77.0) Gecko/20100101 Firefox/77.0
[WS] 2 new client
[WS] 0 [handleHeader] RX: Accept: /
[WS] 1 [handleHeader] RX: Accept-Language: de,en-US;q=0.7,en;q=0.3
[WS] 2 [handleHeader] RX: Accept-Encoding: gzip, deflate
[WS] 3 new client
[WS] 0 [handleHeader] RX: Sec-WebSocket-Version: 13
[WS] 1 [handleHeader] RX: Origin: moz-extension://79922fef-6785-6549-9f19-3efc822c7d29
[WS] 2 [handleHeader] RX: Sec-WebSocket-Protocol: arduino
[WS] 3 [handleHeader] RX: Sec-WebSocket-Extensions: permessage-deflate
[WS] 4 new client
[WS] 0 [handleHeader] RX: Sec-WebSocket-Key: 3yzKvswNEXx9sBqgHUK7qw==
[WS] 1 [handleHeader] RX: Connection: keep-alive, Upgrade
[WS] 2 [handleHeader] RX: Pragma: no-cache
[WS] 3 [handleHeader] RX: Cache-Control: no-cache
[WS] 4 [handleHeader] RX: Upgrade: websocket
[WS] [WS-Server] No free space new client
[WS] 0 client connection lost
[WS] 0 client disconnected.