GPU acceleration needed message on a MacBook Pro M2 32 Go

Hi,

after I dragged an FX (third party), the red banner message "GPU acceleration needed" shows.

On my project settings, the playback and render settings is : Mercury Playback Engine GPU Acceleration (Metal) Recommended". In fact this setting is greyed out, I guess that it must be OK since there's no better option... (but I still don't understand why it's greyed out).

So what do you think it's happening with this effect ? Is there a way I can make the red banner disapear and make the effect work ? 

Thank you for your help !

config : MacBook Pro M2 Max - 32 Go - MacOs Ventura 13.5.1