How to resolve the NS_ERROR_FILE_TOO_BIG error in a POST request in PHP?

Question

I have this error when making a request via POST in PHP. NS_ERROR_FILE_TOO_BIG Attached image.

I couldn't identify where the problem is. I noticed that when there are few records to be returned it works, the problem happens when there are more than 100 records.

The returned array is created in a foreach . I noticed that when there are less than 100 records to interact with, foreach works. The error occurs when there are more than 100 records.