The following error appears next to the Application Startup File in Domains > example.com > Node.js:
PLESK_ERROR: The file does not exist
The NodeJS application doesn’t work
Application Startup File is missing in the Application Root directory.
Go to Domains > example.com > Node.js
Verify that the Application Root directory is set to the existing directory
Make sure that the Application Startup File exists in the Application Root directory and set the correct name
For the working capacity of Node.js, the following conditions should be met:
The Application Root directory must be equal to the subdirectory of the Document Root directory
The Application Root directory must be equal to the Document Root directory.