I think the problem is the File API
Function "upload" (files/externallib.php)
if ($dir = $browser->get_file_info($context, $component, $filearea, $itemid, $filepath, '.')) {That is ever "false" - but the File is correct in the temp Path "moodledata/temp" (why not temp/wsupload ?)
Input from $context, $component, $filearea, $itemid, $filepath
object(context_user)#132 (5) {
["_id":protected]=>
int(31)
["_contextlevel":protected]=>
int(30)
["_instanceid":protected]=>
string(1) "5"
["_path":protected]=>
string(5) "/1/31"
["_depth":protected]=>
string(1) "2"
}
string(4) "user"
string(5) "draft"
int(52815862)
string(1) "/"Tested on: 3.4+ (Build: 20171208)