"You are not authorized to act on submissions that belong to another user." Error in File Upload on File Exchange

I packaged a MATLAB toolbox and passed it to a colleague to upload the .mltbx file to upload to the File Exchange. However, when he tried to upload the file, the following error was shown.

I've tried changing the project manifest (the .prj file) to have the following lines

<param.authnamewatermark>Ricardo Sanfelice</param.authnamewatermark>

<param.email>[e-mail]</param.email>

where "Ricardo Sanfelice" and "[e-mail]" are the name and email address associated with the File Exchange project. I then repackaged the toolbox, but the file exchange is still blocking the upload.

Is there any way for one user to package a toolbox and another to upload it?

[Walter Roberson]

I have raised your question in an internal resource that some of the FEX developers look at.

[Chandler Crane]

Hi Ricardo

Can you attach the .mltbx file so I can investigate further?

Thanks!