What is a 429 Error?
A 429 error occurs when you have sent too many requests in a given time frame. Some servers have security in place to stop when request numbers go over a certain limit in a certain amount of time.
How Can I Fix a 429 Error?
You should take the process you were running prior to the error and put it to sleep. Sometimes the error will give you the time it will take for the error to go away. If this is the case, this should be how long you keep your process is sleep mode.
Note: You should not try to get around the limit cap. Servers have request caps for a reason: it prevents the servers from becoming overloaded and completely crashing.