When using the bridge in after effects I keep receiving a message that reads "ReferenceError: Functionapp.project.activeItem.selectedLayers[aLayer].applyPreset is undefined" I am just learning how to use after effects so im not sure if it is something that im doing or what. Can someone please help? Thanks!
Nobody can tell you anything without proper system info or other technical details like version of AE. This is a script error and you need to explain what you are actually doing.
Make sure Bridge and AE are both up to date. There was a bug in earlier versions of Bridge. If you have been successful using Bridge to apply presets in the past then you might have run into this bug. If you are new to using Bridge to apply animation presets then make sure that you have gone through the training materials so your workflow is correct.