This address is your app's base URL only. The working Whop surfaces use path templates from your app's Hosting settings:
/dashboard/[companyId]/experiences/[experienceId]If DocsHub opens correctly from Apps but not from a Home card, the Home entry is likely pointing at / instead of a dashboard or experience path. In the Whop developer dashboard, set Hosting paths as above and ensure any Home / product shortcuts target the same kind of URL Whop uses for Apps (with biz_… or exp_… in the path).