Hi Akshara,

The past AP World History course was retired because it was no longer aligned with the current exam standards, but I believe an updated one is being worked on. This article from May 2020 gives some resources in the meantime: https://support.khanacademy.org/hc/en-us/articles/360041668671-AP-Resources-for-Students-During-School-Closures#h_70a0f772-2476-4424-b7fa-b97f9e0cde99

I hope this helps! Please let me know if you have any further questions.