Hi BL,
Thanks for reaching out! Sorry to hear you've run into this snag when downloading the Storyline 360 application!
The error you encountered indicates that your user does not have sufficient privileges to perform the update installation on your computer. Please ask your IT staff to run the update procedure using admin rights to see if this helps.
Alternatively, you can download the most recent version of Storyline 360 from the link below if you'd like to manually install the update:
Please let us know if you have any questions!