Library module Error with video (cannot play)

stetondo

New Member
Joined
Mar 17, 2020
Messages
5
Location
Italy
Lightroom Experience
Beginner
Lightroom Version
Classic
Lightroom Version
10.1
Operating System
  1. macOS 10.15 Catalina
Since few days ago, I have now unable to play any video file in the Library module.
I can "see" them in the Grid view, but as soon as in go in Loupe it gets stuck and remains grey.
Files are .MOV and I can open them in QuickTime.
See example in screenshot below.
Can anyone help me?
Thanks in advance
Stefano
Can anyone help me?
EXAMPLE SCREENSHOT.png
 

stetondo

New Member
Joined
Mar 17, 2020
Messages
5
Location
Italy
Lightroom Experience
Beginner
Lightroom Version
Classic
*Edit*
Most of files show no specific error;
for few files ( I am unable to understand what is the rationale behind) I receive a "Unknown message: develop_setting"
Example error.png
 
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