• Welcome to the Lightroom Queen Forums! We're a friendly bunch, so please feel free to register and join in the conversation. If you're not familiar with forums, you'll find step by step instructions on how to post your first thread under Help at the bottom of the page. You're also welcome to download our free Lightroom Quick Start eBooks and explore our other FAQ resources.
  • Stop struggling with Lightroom! There's no need to spend hours hunting for the answers to your Lightroom Classic questions. All the information you need is in Adobe Lightroom Classic - The Missing FAQ!

    To help you get started, there's a series of easy tutorials to guide you through a simple workflow. As you grow in confidence, the book switches to a conversational FAQ format, so you can quickly find answers to advanced questions. And better still, the eBooks are updated for every release, so it's always up to date.

Unknown problem opening the catalog

Jan 27, 2021
Lightroom Experience
Lightroom Version
Lightroom Version
LR Classic latest updated 10.3
Operating System
  1. macOS 11.0 Big Sur
Since yesterday everything was ok. Today when I open LR Classic i get a message "cannot open because of an unknown problem" (my translation from italian.
If I try to open with a different catalog (from my backups but current LR version= LR_2019-2-v10.lrcat ) again the same message appears.
I'm on a Mac Pro (late 2013) Big Sur 11.4

Any suggestion much appreciated, thanks.


  • LR message pdf.pdf
    98.9 KB · Views: 26