I am aiming to use Open meetings in my project. Before doing that, I was starting with some UI colour changes and check the system on my local machine. For doing this, I cloned the Git repository https://github.com/apache/openmeetings .
After this, executed the command: mvn clean install -PallModules
*Working with Java version 11 and mvn version 3.6.3
After the execution, build generates successfully:
After this, as mentioned in git, I followed following steps:
- go to openmeetings-server/target directory
- extract apache-openmeetings-x.x.x.tar.gz (or apache-openmeetings-x.x.x.zip for windows) to new directory
- enter to this new directory and execute ./bin/startup.sh (./bin/startup.bat for Windows)
Results says, Tomcat started. Also with command netstat -lntp, I can see port 5080 is occupied by a java jar. 
But, the problem is when i open http://localhost:5080, it successfully redirects me to http://localhost:5080/openmeetings/ but shows site can't be reached.
This is very weird, please help!
Build instructions and helpful commands are here
https://openmeetings.apache.org/BuildInstructions.html
I would recommend to use
unpackedbuildOM at http://localhost:5080/openmeetings works for me as expected
(I would recommend to use it at https://localhost:5443/openmeetings overwise Camera&Microphone will be blocked by browser)
Is it possible your request is being blocked by FW?
P.S. I'm one of OpenMeetings devs