crashes at start

hi  

since a few days , lightroom classic latest version crashes at start , for nothing , I tried to save the catalogue , bu t no way now I created a new catalogue , copied the old in . but now  the uploaded  photos are not synced . the masks do not update , so all the work it  lost and photo can go to the junk . I can't redo what I did before .

the program even don't recognize people when there  is only a person in the photo .

before it crashed badly , I had a strange message appearing constantly  see https://helpx.adobe.com/lightroom-classic/desktop/technical-support/workflow-issues/catalog-issues/ai-edits-storage-error.html .  

support wanted me to purchase credits I I was certain its not that , I the new catalogue has not that problem , now nothing works . anyone experienced something like this? is there a way. to save something