Discussion on: error from Forem Self-Host on aws install

[WARNING]: Failed to load inventory plugin, skipping community.digitalocean.digitalocean
[WARNING]:  * Failed to parse /var/selfhost/inventory/forem/setup.yml with ini plugin: Invalid host pattern '---' supplied, '---' is normally a sign this is a YAML file.
[WARNING]:  * Failed to parse /var/selfhost/inventory/forem/setup.yml with yaml plugin: We were unable to read either as JSON nor YAML, these are the errors we got from each:
JSON: Expecting value: line 1 column 1 (char 0)  Syntax Error while loading YAML.   did not find expected key  The error appears to be in
'/var/selfhost/inventory/forem/setup.yml': line 87, column 13, but may be elsewhere in the file depending on the exact syntax problem.  The offending line appears to be:
# vault_secret_key_base:             vault_secret_key_base: !vault |             ^ here
[WARNING]: Unable to parse /var/selfhost/inventory/forem/setup.yml as an inventory source
[WARNING]: No inventory was parsed, only implicit localhost is available
[WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost does not match 'all'