My synced collections in ligthroom mobile are empty while in lightroom classic they are ok

[JFRIVASV]

I transferred my Lightroom Classic catalog (150,000+ images) from a HDD to my Mac. Since then I've had syncing problems. The biggest one is that now my collections in lightroom mobile for iphone and ipad are all empty and completely disorganized. Even though it appears that all photos are on the cloud. All collections in Lightroom Classic are ok!

Is there a way to recover the collection structure in moblie devices?

[selondon]

How did you transfer you're photos from Lightroom Classic to the Cloud?

Did you use the migration tool in Lightroom (Cloud) Desktop?

[JFRIVASV]

I uploaded all my collections directly from Lightroom Classic while my catalog was on an external HDD. After I moved the entire catalog contents to the internal HDD of my Mac, the collections in Lightroom Mobile got all messed up!