null

I am getting the following message when uploading a file to our website.

null Uploaded successfully.  
[ ] allow dialogs from {our website} to take you to their tab.

I have uploaded another file, with no issue.  

I changed the file name, the publish name, and uploaded it as a new file.  "Null" is the file name.  The file was not uploaded successfully. (we were getting this message before filename change.)

I have to admit it has been 2.5 years since I have worked on this.  Someone else in the company took it over, and they have now tasked me to find out why the file is not loading.

File was originally created under Captivate 8, and then updated in Captivate 9 by another user. I am using Captivate 2017 (10).

I do not know if the file I am currently trying to upload is the original with changes, or a new file.