ActiveSupport Cache DeserializationError constant DeserializationError Ruby on Rails 7.1.6 Since v7.1.6 Available in: v7.1.6 v7.2.3 v8.0.4 v8.1.2 Compare with: … v7.2.3 v8.0.4 v8.1.2 Raised by coders when the cache entry can’t be deserialized. This error is treated as a cache miss.