please provide the step by step process to uninstall appmon agent in linux server.
You might be able to reference the following community post here: Documentation - Dynatrace Community on how to uninstall AppMon Agent after downloading the zip archive.
Did you follow the steps to run the HTTP server, if you did and are not seeing it still, I would recommend reaching out in the post that was linked above:
Link to the section I am referring to: here
python -m http.server 8000
npx serve -p 8000
webfsd -F -p 8000