Quick collection not working after update Oct 2020

[#1]

 What is this? I get this when I try to add a photo to the quick collection.

"?:0: attempt to compare nil with string"

It occured after I did the latest update. 

[#2]

 What is this? I get this when I try to add a photo to the quick collection.

"?:0: attempt to compare nil with string"

It occured after I did the latest update. 

[#3]

Please post the exact name of the Adobe program you use so a Moderator may move this message to that forum

[#4]

I have same problem - clearing Quick Collection - worked initially - now blocked again

[#5]

Does the photo thumbnail have an Exclamation mark on it in the grid view?

Show us a screen shot of your LrC window in the Library module.

I moved your post over to the LrC forum which someone else moved from the poorly named "Using the Community" forum, which is for getting help using this forum system, to the CC Services forum.


I hope this helps. Best of luck to you.

[#6]

Sorry that I don't have a solution but I do have the same problem on Lightroom Classc 10.0 release (latest version). I'm using macOS Catalina Version 10.15.7, if that makes a difference.  

[#7]

Is the Quick collection set as the target collection? Or, is it possible that you set a different collection as the target collection and that collection is been deleted so now Lightroom doesn't know what collection to add the images to? Just wondering.