Are you possibly running into Hubspot's rate limits? Without more context, I'm not clear on what you're trying to do; are you trying to pull a list of 10,000 companies from the same API call?
I try to get companies based on a search filter and get pages by limit = 100 (which is maximum of the API). If a next page is available I get it after a while I run into this error. I have tried postman and this has nothing to do with limit rates of I exceed 10000 it fails. thx Ralf