Hi @Anshu kumar,
I have waited quite a while and now found a new version 6.1.3 in the Mac AppStore. I removed all local data and tried to sync with my NextCloud again.
If I type the URL to the WebDav without https:// the client crashes immediately and if I type it with https:// it won't sync and the ball spins endlessly.
All my other clients, Win and iOS, work well with the same folder.
I am struggling with the WebDav issue ever since the 6.x.x released :-(
Thank you and kind regards,
Sebastian