Unable to open project due to "Unable to parse project Information" message

I am unable to respond to Private Messages.

We haven’t seen any reports of this error since 3.1.3 was released. The first thing to try is running in 3.1.3.

If that doesn’t work, you can try the recovery steps outlines in this post: Corrupt or Otherwise Broken Audacity Project Recovery

Before you do anything, make a copy of your .aup3 project file, and try to work on a local copy (don’t use files on the cloud or files that are being replicated to the cloud).

Let us know how you make out.