Looks like a few regressions for when using chwala API as a library:
[18-Feb-2017 19:41:13 Europe/Berlin] PHP Fatal error: Call to undefined method file_api_file_move::session_uri_update() in /usr/share/chwala/lib/api/file_move.php on line 118 [18-Feb-2017 19:42:02 Europe/Berlin] PHP Warning: strlen() expects parameter 1 to be string, resource given in /usr/share/chwala/lib/api/file_create.php on line 75