The following error appears in the debug console of the web browser, and the page does nothing.
This happens when pressing F5 or Ctrl+R to reload the whole page when using websockets.

I've tried increasing the textBufferSize in Tomcat with no effect at all.

Uncaught DOMException: Failed to construct 'WebSocket': The URL 'ws://192.168.1.140:8080;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5/zkwm?dtid=z_4910' is invalid.
at Object.start (http://192.168.1.140:8080/zkau/web/32d7f52b/js/zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:1145:232)
at eval (eval at <anonymous> (http://192.168.1.140:8080/zkau/web/32d7f52b/js/zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:52:35), <anonymous>:1:38)
at Function.afterLoad (http://192.168.1.140:8080/zkau/web/32d7f52b/js/zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:489:35)
at eval (eval at <anonymous> (http://192.168.1.140:8080/zkau/web/32d7f52b/js/zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:52:35), <anonymous>:1:4)
at eval (<anonymous>)
at http://192.168.1.140:8080/zkau/web/32d7f52b/js/zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:52:35
at Function.globalEval (http://192.168.1.140:8080/zkau/web/32d7f52b/js/zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:52:46)
at Object.script (http://192.168.1.140:8080/zkau/web/32d7f52b/js/zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:552:439)
at m (http://192.168.1.140:8080/zkau/web/32d7f52b/js/zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:530:216)
at Object.process (http://192.168.1.140:8080/zkau/web/32d7f52b/js/zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:538:106)
start @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:1145
(anonymous) @ VM3166:1
afterLoad @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:489
(anonymous) @ VM3166:1
(anonymous) @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:52
globalEval @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:52
script @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:552
m @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:530
process @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:538
(anonymous) @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:495
(anonymous) @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:498
setInterval (async)
(anonymous) @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:498
l @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:96
fireWith @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:97
ready @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:48
K @ zk.wpd;jsessionid=6997DE0CC6DE76F7A41EB245B456C4B5:43