Microsoft has fixed a problem with the Windows 10 Store that had prevented a number of users from being able to update existing Windows Store apps and/or download new ones.
A week after users -- including me -- began reporting problems with the Windows 10 Store, Microsoft seems to have fixed the issue.
In the early hours of August 11, Microsoft officials said to expect a fix for the Store issue to come via Windows Update within 48 hours. I don't think this ultimately is how Microsoft repaired the problem, however, as I don't see any new Windows Updates in my history beyond the usual Windows Defender definition updates.
I've asked Microsoft officials for more information on what caused the issue and how the company ultimately fixed it, but have yet to hear back.