Dry leaves on camellia tree

[Forest123]

Our camellia tree was transplanted in the fall. It seemed to be doing just fine and bloomed without a problem. But, in the last week the leaves have gotten brown and dry and it is looking less healthy.

Here is a link to photos of the tree https://imgur.com/a/3u87ACI.

Any suggestion on what to do? Also, other care suggestions are most welcome!