An improperly configured YAML file may show the error Error Parsing YAML File: Mapping Values Are Not Allowed Here . This error is demonstrated below:
Here is an example YAML file that causes this error:
application:application-id
version:1
runtime:php
api_version:1
threadsafe:true
#Error happens at line 7 below, even though the incorrect lines are above.
handlers:
- url: /example
Even though the YAML parser reports the error at line 7, the actual incorrect lines are above that point: lines 1 – 5 are missing the space character between the colon and the value. If you encounter this error, make sure that the key: value pairs are separated by 1 colon and 1 space character, as shown below:
application: application-id