Sometimes an error occured when you want to Add or approve a File.
When the Path to the File and then name over 100 Characters.
Solution:
You must change the length of the field 'file' at the table blocked_files.
Example for SQL:
ALTER TABLE `blocked_files` CHANGE `file` `file` VARCHAR( 120 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL
Thank you for this