Unable to upload a file: This file type is not supported

Issue
You try to upload a file and receive the following error: This file type is not supported.

Cause
The default legal extensions are: bmp,csv,doc,gif,ico,jpg,jpeg,odg,odp,ods,odt,pdf,png,ppt,swf,txt,xcf and xls.If you try to upload a file that is not in the legal extensions you will receive this error.

Resolution

1. Go to Content > Media Manager > Options.
2. Edit the Legal Extensions (File Types) field to include your desired file extension.
3. Save & Close the changes.