# [Project] Support `.yml` / `.json` extensions
useAsyncData's return type for data and error still is `| null` in v4
types3.xbug🔨 p3-minor
TypeError: Cannot read properties of null (reading 'plugins')
workaround available2.xbug❗ p4-important
Types Error for types exported from external libraries.
types3.xpending triageupstream