Microsoft is warning customers that use Microsoft Project and have installed CVE-2019-0784 (a recent security update for aWindows ActiveX Remote Code Execution Vulnerability), may not be able to open certain files anymore.
The issue is with Microsoft Project files with spaces in the name.
We are investigating and hopefully will soon get a fix for this, but depending which part we need to fix (client, server or service) it could take a while before it is available in an update or your distribution channel. There are workarounds – you can still open just fine by opening the client Project application and then File, Open to select the project, or you could just rename the plan and remove the space(s).
So far, there’s no promised date for the ultimate fix.