getStyleAt() is not a function | After Effects Expressions

I was trying to combine both text style & Sourcetext but it kept telling me it's not a function.

I have the most updated version of After Effects.

New Participant

Hi, I've found a solution you just have to change the project setting to JavaScript

New Participant

genius ! worked for me, thanks 🙂

New Participant

I just opened a new project and import the old one, then problem fixed.

Still don't know the reason. Maybe it's just a bug.

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