Hi, first time I have had this problem. Opened a holy grail-sequence in LRT, then saved. But when I should read metadata in Lightroom, it was greyed out together with "Save metadata".
I´m working on a new harddisk  with this images, and they were already imported into Lr.

Most likely the sequecnce is "out of sync" in Lightroom (missing image or something like that). Right click on the folder in the LR-Library -> Synchronize. Then try again.

I took a restart of both LRT and Lightroom, and then i could read metadata! As always, super thanks for your quick answer!