There are 2 reasons for this problem:
1. Your available word count is insufficient, please upgrade the package to solve it, or wait until the next month to reset the word count.
2. There is a problem with the maximum length result setting, some length results default to 200 characters, you can modify it to 2000, OpenAI tips it is best not to exceed 2000 characters, unless you upgrade the model that supports GTP4, you can set the number of 32K characters.