I went through this yesterday when I updated. I used the instructions @jbardi provideed here in step no 5. And followed the link from the github Ha-Bridge repo.
It took me a very long time to realise I’d messed up a directory when I copied the instructions from github.
This line
ExecStart=/usr/bin/java -jar -Dconfig.file=/home/pi/amazon-echo/data/habridge.config /home/pi/amazon-echo/ha-bridge-3.2.0.jar
Should be
ExecStart=/usr/bin/java -jar -Dconfig.file=/home/pi/habridge/data/habridge.config /home/pi/habridge/ha-bridge-3.2.0.jar
The git hub links here for further info.
Second problem was it now defaults to port 80, which caused a conflict, the github has instructions for changing this back to 8080 as it was before.