getStyleAt() is not a function | After Effects Expressions

[Alyssa Yee]

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.

[Alyssa Yee]

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.

[shoaibaghi]

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