Second, something seems to have changed in the Local REST API plugin. I found that in order to reveal the port numbers, I had to check 'Show advanced settings' and then it looks much different to your screenshot. This also shows the API key in a form that can be copied to the clipboard, in contrast to the position you show in the screenshot, which is certainly a blessing!
First there is a typo in the readme.md:
${scheme}://localhost/${port}
Should be:
${scheme}://localhost:${port}
Second, something seems to have changed in the Local REST API plugin. I found that in order to reveal the port numbers, I had to check 'Show advanced settings' and then it looks much different to your screenshot. This also shows the API key in a form that can be copied to the clipboard, in contrast to the position you show in the screenshot, which is certainly a blessing!