Thank you for getting in touch. Any theme bought from Themeforest or any other third-party website is not subject to the same quality requirements that must be met on the Shopify Theme Store, which means these sorts of errors are likely to happen with these theme files. You will need to reach out to the developer of the theme about this error and ask them for guidance on how to resolve this. I would also suggest checking out our own Theme Store to view official themes created either by Shopify directly or by approved third-party theme developers, all of which will be supported fully and less prone to technical problems.
Best of luck and please let me know if you have any further questions.
Victor | Shopify Social Care