b4j server

I am trying to run a server with B4J using following article https://www.b4x.com/android/forum/threads/server-upload-files-from-your-b4a-app-to-your-b4j-server-over-the-internet.37201/#content When i run the B4J program i get the following lines in the log. there is a warning for invalid cookie...

Hello My B4J server was up and now stopped. I tested firewall and anti-virus but could not identify the source of the problem. I'm working on server development by following the following example...