localhost web address cannot be reached

[jyj5558]

Hi,
First, I really appreciate your development and maintaining blobtoolkit software which is amazing tool!

I wanted to use blobtoolkit viewer (https://blobtoolkit.genomehubs.org/blobtools2/blobtools2-tutorials/opening-a-dataset-in-the-viewer/) on our school's cluster.
I also followed website link of blobtoolkit's install instruction (https://blobtoolkit.genomehubs.org/install/)

I had all files and directories to command the viewer (e.g. DATASETS BlobDir, and blobtoolkit software itself, blobtoolkit viewer dependencies),
and on the terminal the command "blobtools view --remote" seemed work and gave me a localhost address.
but when I visited the assigned 'http://localhost:8003/view/all', my chrome and firefox both said the site can't be reached (localhost refused to connect).
So I even changed Windows Firewall outbound setting to allow remote port 8000–9000, but still it does not work.

When I used different blobtoolkit command, "blobtools host --port 8081 --api-port 8001 /path/to/my/DATASETS" it said error again.
'ERROR: Port 8081 already in use, unable to host BlobtoolKit viewer.'

So I changed the port number to "--port 8091 --api-port 8091", it seemed work like below,

Starting BlobToolKit API on port 8091 (pid: 14595)
Starting BlobToolKit viewer on port 8091 (pid: 14629)
Visit http://localhost:8091 to use the interactive BlobToolKit Viewer.

but still the web address cannot be reached.

Is it a cluster problem that I do not have some kind of permission to localhost website using cluster?
Should I tried on my local machine (Ubuntu)?

I followed the hosting instruction (https://blobtoolkit.genomehubs.org/btk-viewer/viewer-tutorials/hosting-a-local-instance/), but it did not work either.

Anyone knows how to resolve this? I really appreciate your help.

Thank you,
Jong Yoon