SYMPTOM:
When creating a package on Object Manager a Denied Permission error is displayed on screen after clicking to Export to text or Export to Excel.

STEPS TO REPRODUCE:
1. In the Object Manager log in a Project Source
2. Open a Project
3. In the Tools menu click on Create a Package
4. Add a Report or Document
5. Click to Export to Text or Export to Excel

CAUSE:
This is an expected behavior since the user does not have privileges to save to package file in the Destination folder.
ACTION:
There are two solutions:
1 - Right mouse click the Object Manager icon and Run as Administrator

2 - Change the destination file directory to a permitted path. This should be configured in menu Tools -> Object Manager Preference -> Object Manager -> Browsing -> Default output folder for Object Manager:
After applying any of the workarounds mentioned the package file will be created successfully:

KB441866