As Salma Sach stated the issue, I’m experiencing the same. It all started around 2 weeks ago and since then it’s nearly impossible to fetch market data as there’s always this strange error called fetchURL. I’ve already researched what that means. It says there were more than 10,000 calls in 24 hours. As I have only ~20 requests per manuel update, I don’t know how it’s possible to exceed 10,000 
I appreciate your work and it was of great help for me until lately. Would be glad if there’s some workaround or solution to the problem.