Error: account has zero or negative balance
This error usually referring to that you have not enough threads to process the sent captcha.

If you have 15 threads, which mean you will able to send 15 captchas for solving on-time, so if you already have 15 processing reCaptchas and you sent extra one request you will get this error until one of the processing threads done and get free slot again.

Recommended articles:

Understand the threads
How to calculate the CaptchaAI threads for your needs.
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