I'm getting errors from trying to upload images from 2 different fields, server or module issue? Using Drupal 7 and Siteground hosting, when I try to upload images at registration I get this error, but randomly.


  An unrecoverable error occurred. The uploaded file likely exceeded the maximum file size (128 MB) that this server supports.


The form has 2 image fields, a multiple upload and the standard user image field. Sometimes it works, sometimes doesn't work with both fields.

What could be wrong, hosting issue or module issue?
Most of the time this is hosting issues. Review drupal and php error log to pin point exactly where the issue happens. 

Sometimes the upload is successful to the temp folder but it can't move it to the files directory due to permissions ect..