$mountManager : \League\Flysystem\MountManager
formatDsn(\phpDocumentor\Dsn $dsn) : string
Removes file:/// scheme from the dsn when needed.
The local adapter of flysystem cannot handle the file:/// on all windows platforms. At the moment it is unsure why this is exactly happening this way but it seems that php on windows 10 is not able to handle streams properly while windows server is able to do this.
Github actions will NOT reproduce this behavior since they are running a server edition of windows.