I have it happen constantly when my cloud back is running, so I only run that at the end of the day now.   

If your anti virus is constantly scanning PS files, that could cause the problem as well. 

Sometimes you just need to reboot the computer and that clears the ROM or RAM or whatever resource it is that PS is hogging.

I have noticed it happening more this year. It not only is effecting 2024, but is starting to effect 2023 & 2022 as well.  Could it be a behind the scenes data handling?

I had the same error message on 2024 program this week. Called support and they gave me a link about configuring AV to exclude Proseries 24 . Have no idea what it meant. The girl had no real knowledge. I think it has to do with Intuit loading sales data popups on program. I don't know but it is irritating and I've just started tax work.

"Have no idea what it meant"

That meant the support person believed the issue related to a conflict with your antivirus program.

As an update related to the AV: I completely disabled the AV temporarily and the local firewall.  

This issue still was occurring.  

thats what i suspect too.  I think somehow, somewhere their sales data and advertisements are getting blocked as spam.  Again I have no concrete proof or even at what level the block is occurring.  I suspect at the firewall level for the facility since its all machines but who knows at this point.

I dont see any sales or advertising anywhere.  When I get the message I open Task Manager and see a string of processes related to Proseries, sometimes if I end Task on a few of those, it remedies the issue right then, but it could be that it finally stopped on its own anyhow.  It always eventually clears itself if you have the patience to wait

Im not a programmer but theyve got something in their programming thats not allocating processes properly or something, and makes everything "hang", it seems to get worse each year.  The message used to be different and had 3 button choices,  "Cancel, Retry and Switch To"  but none of them ever did anything to fix the problem either.

I am getting the same message on four (4) pro-series software as of Friday Jan 11th.  Year 23 and 24, both Basic and Pro.  Cannot use, have to keep clicking over and over, seems around 20 times until it goes away.  So now afraid to log, close out and have to re-open the tax software again.  From reading above messages, no solution yet.  What do we do ? 

Grand timing of this now during very busy season.  Use my tax software pretty much year-round and do remember in the summer having this same issue.  Called customer two separate times.  First short-term one day fix.  Then 2nd did finally get fixed.  Cannot remember how resolved as a couple hours of time with tech trying many different things and approximately 6 months ago.  

Problem has finally been solved after days of troubleshooting and head banging.   The practice has a Watchguard Firebox Firewall.  Part of my troubleshooting was turning off the PC AV and firewall and then disabling the practice firewall.  None of this helped.  After much persistence, it turns out, this particular firewall packet scans for for viruses coming into the practice at the gateway level.  I turned a setting from scan all packets to scan random packets and that seems to have resolved the issue!  Thank you all for your comments.

It happens when something in the background is scanning files, which is why I turn off my cloud backup until the end of the day.