The Forge Energy output block (in-game "Energy Emitter") doesn't have a recipe. The block is listed in JEI and available via cheats, but can't be created in normal survival mode.

generators-0.9.20.3-mc1.11.2.jar

Workaround:

1. Open the jar with 7zip and go to assets/advgenerators/config.

2. Copy recipes.cfg to your config folder in config/AdvGenerators/overrides

3. Add the following lines to your copy of recipes.cfg

   RMR
   FWF => B:advgenerators:forge_output
   RwR

Fix merged, thanks!