Hm, I can't replicate this.
Maybe something on your network is closing the request. The error "request aborted" could mean that it was aborted by client.

This is what I do exactly:

Launch Small EC2 instance
Ubuntu Server 20.04 LTS (HVM), SSD Volume Type - ami-0c960b947cbb2dd16 (64-bit x86) / ami-0aa72f02ca1be5339 (64-bit Arm)
64-bit (x86)

Keep the defaults and just add security policy
Custom TCP Rule TCP 5488 Anywhere

Then I ssh to the machine and run the following commands

# install node.js wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash # you may need to reopen terminal nvm install 8.11.3 mkdir jsreportapp cd jsreportapp npm i -g jsreport-cli jsreport init jsreport configure # chrome dependencies sudo apt-get install -y libgconf-2-4 sudo wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add - sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list' sudo apt-get update sudo apt-get install -y google-chrome-unstable fonts-ipafont-gothic fonts-wqy-zenhei fonts-thai-tlwg fonts-kacst --no-install-recommends # on ubuntu 20 run also sudo apt-get install -y libxtst6 libxss1 # start jsreport to see it running on port 5488 jsreport start

Then I open in the browser http://ec2ipaddress:5488. I see the studio. I can open the invoice sample and render it.