How Do I Fix Preview Cache in Lightroom?
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How do I rebuild previews in Lightroom?

Rebuild Previews.

Open Lightroom, select images, and go to Library>Previews>Build Standard Size previews. They will start to rebuild.

Why is there no preview in Lightroom?

Lightroom displays gray thumbnails or the error: “Lightroom encountered an error when reading from its preview cache and needs to quit. Lightroom will attempt to fix this problem the next time it launches.” If restarting Lightroom does not fix the issue, remove the preview folder (Windows) or preview file (Mac OS).

James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.

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