Text to speech conversion error

Iā€™m trying to crete an app that converts uploaded txt files to speech. This is the code

Screen Shot 2022-10-25 at 11.56.58 AM

I get this error on the app. Please what does it mean and how can I fix it

Hard to say by just looking at those blurry pictures. Remember that source code and error messages are made of text, not pixels.

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