Spotlight and apps not working in mac os 26 tahoe.

It's due to a corrupted index or a temporary glitch in Tahoe. Restart your Mac and see if this is resolved.

In most cases, a simple restart can fix any temporary glitches. If not, try rebuilding the Spotlight index: go to System Settings < Spotlight < Spotlight Privacy, drag your Macintosh HD in, wait 30 seconds, then remove it to force reindexing. If that doesn’t fix it, reset the CoreServices cache by running killall -KILL Finder and killall -KILL Spotlight in Terminal, then restart.

After a lot of frustration, I was able to get Tahoe Spotlight to work correctly with some but not all of the "App Background Activity” switches in “Login Items and Extensions”  switched off. One or more of the items that I turned off appeared to be causing the problem, but I have not been able to narrow it down any further. Some other people report in Apple Discussions that the Adobe items cause the issue, which may be true, but there are definitely other culprits since Spotlight still would not work for me after turning off just my Adobe items.

Start by turning these all off and I believe you will see that Spotlight works correctly. Then turn them back on one by one and see what happens. This is very reminiscent of the old System Extension conflicts that existed (and infuriated) in pre-OSX days.

For sure, it seems as though the bug is related to login extensions.

Try restarting.

26.1 automatically solved the issue for me, no action needed

Even reindexing doesn't solve for me