icopy

It seems that I've fixed the problem. Open VM tab Edit VMs in XML mode Change "port" properties in "graphics" section from -1 to a valid number, like 5702 Change "websocket" properties in "graphics" section from -1 to a valid number, like 5902 I don't know how these properties are set to -1. There is not place in the form view to change these values. If unable to make these changes due to nginx workers crashing, restart the unraid server and don't open any vnc view before changing these values.

Same here. This has something to do with VM and webUI. Here's /var/log/nginx/error.log ker process: ./nchan-1.2.6/src/store/spool.c:479: spool_fetch_msg: Assertion `spool->msg_status == MSG_INVALID' failed. 2020/03/13 14:14:07 [alert] 3138#3138: worker process 3368 exited on signal 6 ker process: ./nchan-1.2.6/src/store/spool.c:479: spool_fetch_msg: Assertion `spool->msg_status == MSG_INVALID' failed. 2020/03/13 14:14:10 [alert] 3138#3138: worker process 3371 exited on signal 6 ker process: ./nchan-1.2.6/src/store/spool.c:479: spool_fetch_msg: Assertion `spool->msg_status == MSG_INVALID' failed. 2020/03/13 14:14:13 [alert] 3138#3138: worker process 3377 exited on signal 6 These messsages appear even after I restart nginx.