Update as of 7/27/22.  Looks like Dell got this issue resolved.  Thanks Jesse (forum moderator here) for taking the reigns on this.  As of this morning, I was still battling with Dell Tech Support via private messages as they were continually asking me to reinstall the operating system on my laptop.  Not going to happen when I knew the problem was on Dell's end.  27 year I.T guy here, I can pretty much smell when the problem is systemic or when it is one user's issue.  And with the number of folks that had the same issue, and 1563 views of this thread, it was very clear that this was Dell's issue.   And now it looks like it is fixed.  Works for me now.  Will accept this as a solution.  Thanks again Jesse.    
Can't run Dell Update on my Inspiron 15-5510.  This feature worked until yesterday, 7-17-22.  When I pull up the Dell Update program (version 4.4.0), the application starts as normal.  But when I click on CHECK to start the program, I get this message:  SYSTEM IS NOT SUPPORTED BY AVAILABLE CATALOGS.  Anybody have any ideas on what might be happening? The computer is working perfectly, this is the only issue. I have another older Dell Inspiron 15-7569 where Dell Update works fine.  Any ideas would be appreciated!  
Dell Update: System is not supported by available catalogs