I just figure out what happened, if we have multi document sets in the same document library, I just can edit the first one, another one/ the others cannot be edited.
Another thing is, the Welcome Page of Document Set cannot be presented in the Modern Page?? Is it correct??
Per my test, the welcome page of document set only be supported in the modern page.??? -> Modern Page ?? Typo?? Per my test, it should be Classic View ~~
According to the screenshots in last reply, the welcome page of document set is indeed only supported in the classic page.
I accidentally wrote "classic page" as "modern page" in the previous two replies.
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