MeganServer, web address not found

Dear Community,
I generated .rma megan files to undergo functional analysis of previous .FASTQ files. Now, I would like to start MeganServer to visualise and analyse the results. If I run on the command line, I get the following output: 9: [[: Permission denied
Launching MEGANServer with following options:
Port = 8080
Stop Port = 8181
Stop Key = 7ce31e4eb617c85efbff9450bf9c2fd2
Max Memory = 4G
Name = MeganServer
Starting MeganServer…
MeganServer started. Reachable under http://www.localhost:8080/MeganServer

Picked up _JAVA_OPTIONS: -Dhttp.proxyHost=ID -Dhttp.proxyPort=8080 -Dhttps.proxyHost=ID -Dhttps.proxyPort=8080
INFO::main: Logging initialized @231ms
INFO:oejr.Runner:main: Runner
NFO:oejr.Runner:main: Redirecting stderr/stdout to …/log/yyyy_mm_dd.log

When I open the provided link: http://www.localhost:8080/MeganServer
I get an error message in the browser: “The web address you entered could not be found. This could be because the site is temporarily offline or because the file you requested no longer exists on the web site. Please verify that you have correctly entered the web site address and try again.”

I would be very thankful to get some advice on how to get MeganServer started!
Thanks in advance!