Dear @MattWho  Thanks a lot for the response.  I installed Java SDK 11 and that helps to run NiFi on my laptop. I also change the environmental variables. I add JAVA_HOME under user variables and defined it like %JAVA_HOME%\bin in the path and now it is working fine. For my desktop I did the same thing and I notice NI applications (LabView) installed on my desktop was also using port 8080, so I fixed that one as well. NiFi is working fine on my desktop as well.  I also found the following link relevant and useful for any other community members getting the same error: https://stackoverflow.com/questions/69830860/nifi-will-run-but-wont-open-in-browser-possible-error-with-java All the best  Alireza ... View more