Error: Setting 'type_header_base_size' must be a valid number

Hi.!

I’m trying to copy the entire code from settings_data.json file from one theme to the updated theme, but there is an error after I’m trying to save the code in the updated theme. Error: Setting ‘type_header_base_size’ must be a valid number.

What does it mean and how to solve this?

Thanks in advance!

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