Cirrus SignallingWebServer not run

Hello everyone.
I’m trying to start the Cirrus SignallingWebServer server to test the new Pixel Streaming plugin but I have this error at the start of the command

01:43:34.318 Listening to proxy connections on: 8888
throw er; // Unhandled ‘error’ event

Error: listen EACCES
at Server.setupListenHandle [as _listen2] (net.js:1269:19)
at listenInCluster (net.js:1334:12)
at Server.listen (net.js:1421:7)
at Object.<anonymous> (D:\WebServers\SignallingWebServer\cirrus.js:615:6)
at Module._compile (internal/modules/cjs/loader.js:688:30)
at Object.Module._extensions…js (internal/modules/cjs/loader.js:699:10)
at Module.load (internal/modules/cjs/loader.js:598:32)
at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
at Function.Module._load (internal/modules/cjs/loader.js:529:3)
at Function.Module.runMain (internal/modules/cjs/loader.js:741:12)
Emitted ‘error’ event at:
at emitErrorNT (net.js:1313:8)
at process._tickCallback (internal/process/next_tick.js:63:19)
at Function.Module.runMain (internal/modules/cjs/loader.js:744:11)
at startup (internal/bootstrap/node.js:285:19)
at bootstrapNodeJSCore (internal/bootstrap/node.js:739:3)

The firewall is completely disabled.
I also deleted the “node_Modules” folder and the package-lock.json file before starting the run.bat.

Sorry but I do not know anything about webservers.

change the port number in jjs file and try again.