Error with IDE error code is 413

I have 1451 line of code for an extension and when i add more lines it shows me this error here :

could any one help m e to solve this problem

@extension_developers

If you are developing a large extension, it’s more suggested to move to Rush or Extension Template. They are usually faster, updated for new App Inventor functions (content URIs, helper blocks), and support more functions (manifest, assets, etc.).

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