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I just started getting this error: 

Unable to load application: NameError: uninitialized constant Fog::AWS::CredentialFetcher

No changes except to add omniauth-freshbooks gem (and change its client_options: 'site') beforehand - before deployment to Heroku. Belatedly realized that I'd updated gems betwix and between. The ones updated were bundler, minitest-reporters and spring.

Known error / appears unresolved: https://github.com/fog/fog-aws/issues/83

Tried the recommended 'fix' - below - but it isn't working with Heroku:

Damm. Try changing this:

gem "fog", "~>1.20", require: "fog/aws/storage"
gem "asset_sync"

to:

gem "fog-aws"
gem "asset_sync"

(a) I was not requiring 'fog/aws/storage'; (b) gem 'asset-sync' wasn't installed; (c) fog is required by carrierwave and paperclip - or I'd simply remove all three gems.

The recommend fix doesn't work for me. Any thoughts / ideas / workarounds would be appreciated.

Thanks, Doug

user3763682
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1 Answers1

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I was hit by the same problem and, as long as asset_sync is not actively maintained, @paulrnash started a new fork called neo-asset_sync. I'm using it in production with no issues.

You can configure it like this in your Gemfile. 

gem 'neo-asset_sync', github: 'paulrnash/asset_sync'
gem 'fog-aws'
dgilperez
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