sdk 38 >>> error: unknown option `--assetExts'

Help: Expo SDK
#1

Please provide the following:

  1. SDK Version: 38

I just update expo to 38 and now, when a i do expo start a get

Opening DevTools in the browser… (press shift-d to disable)
error: unknown option `–assetExts’

Metro Bundler process exited with code 1
Error: Metro Bundler process exited with code 1
at ChildProcess. (/@expo/xdl@57.9.20/src/Project.ts:1857:16)
at Object.onceWrapper (events.js:422:26)
at ChildProcess.emit (events.js:315:20)
at Process.ChildProcess._handle.onexit (internal/child_process.js:275:12)

do you know why ?

thx

#2

thx to an other post, i had :

 "assetExts": [
   "ttf",
   "mp4",  
   "png"
]

in my conf. i removed IT and now it’s working.

#3

I get this error, where to add this assetExts ?