Moodle 2.8.3
Theme bootstrapbase: 2.3.0
In Tinymce editor,
to insert a file, clicked on 'media' button-> then clicked on find or upload a sound ... -> then File picker window opened.
Clicked in left menu( upload a file button ), but no 'Choose file' button, nothing is showing, its total empty.
Anybody has any idea, what is the reason behind it?