You could download the PowerApps from the url below to check if it can work.
Do you open your windows session with the same account ? Are you able to install any other app like PowerBI for example ?
Please also make sure that your organization has turned on the Office Store organization option.
1. Go to Office 365 Admin.
2. Choose Settings, Services and Add Ins, then Choose the Office Store, then turn the Store Option on.
Make sure before you try to download that you actually sign in to the store using your work/school account before you attempt to download. Otherwise, it might not ask you for which account you want and do nothing.
Hi, thanks Andy, but that didn't work. I found something that did though:
Read the announcement for more information!
Congrats to the finalists of our ‘Better Together’-themed T-shirt design contest! Click for the top entries.
Features releasing from October 2019 through March 2020
Innovate, Collaborate, Grow - The top training and networking event across the globe for Microsoft Business Applications