Troubleshooting Notion Sync Issues with AE Master Playbook

Hi, I have a question related to the Notion sync. Just as context for the screenshot below, I’m trying to connect my Sales Notion space. One of the most important “folder” under this Sales Notion space is the AE Master Playbook. Inside this AE Master Playbook I have other pages (like a dozen of pages). However, it looks like Dust cannot retrieve the content / pages from that AE Master Playbook, what’s weird is that it looks like there’s no problem for the page below Cross-team Meetings. (cf. screenshot below and the two different icons between AE Master Playbook and Cross-team Meetings). For connecting Notion I followed this guide from the documentation. Does anyone already have this problem of syncing with Notion? If yes please let me know how can I solve it! Thanks a lot