The generic entity processor moved to the project "Feeds Entity Processor"

The generic entity processor, which was added in Feeds 7.x-2.0-alpha8+11-dev, has been removed from Feeds. This processor has been moved to the Feeds Entity Processor module.

If you used the processors "Node entity processor - EXPERIMENTAL", "User entity processor - EXPERIMENTAL" or "Taxonomy term entity processor - EXPERIMENTAL", convert your configuration to use "Node processor", "User processor" or "Taxonomy term processor" instead.
If you used any of the other entity processors that were marked "Experimental", install the Feeds Entity Processor module. Note though that there is a possibility that the processor you used may be replaced by a specific processor in the future. Processors for entity types that do not support saving (via the Entity API) or are used as bundle of an other entity type are removed.

Note: the experimental entity processors for node, user and term may currently still exist in the Feeds Entity Processor module, but they are planned to be removed.