TranscodeVideo says on Android - File not Found - Permission Denied

[NeckbreakerPascal]

Hey there,
run into some strange issue on a pixel with Android-Version (8.1.0).

When I call transcodeVideo, i get an EACCESS Error:

ERROR Error: Uncaught (in promise): java.io.FileNotFoundException: /storage/emulated/0/Movies/.../filename.mp4: open failed: EACCES (Permission denied)
    at c (polyfills.js:3)
    at c (polyfills.js:3)
    at polyfills.js:3
    at t.invokeTask (polyfills.js:3)
    at Object.onInvokeTask (vendor.js:5114)
    at t.invokeTask (polyfills.js:3)
    at r.runTask (polyfills.js:3)
    at o (polyfills.js:3)

• The App has access to the storage
• I also added the use-permissions to the config.xml.

Any ideas?