Hi @Albreezah , try to use only Words, not long Phrases. Also, if you keep gerting errores, just try to build a New flow with that trigger. (Just copy and paste the flow)
In that case @Albreezah is better for you to contact Manychat support, please send them the flow URL so the can help you to identify what is going on. You can use the help center: https://help.manychat.com/hc/en-us jut clic “Get Help”.