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The title of the graphs in a dash app disappear

I deployed my app in my local, the title of my app appears just fine. When I deploy the same dash app in a on-premise dash server, everything looks perfectly fine, except the title of my graph are missing (note - I deployed the same app before in the server a month ago, the title of those graphs is fine). I wondered is there any recent update in the dash_renderer or any other packages that causing this? Thanks!

problem resolved.

There are new updates in some of the dash packages and python packages that I used in my app. It seems to me that maybe some of those changes causing the title arguments in go.layout are not being read(?) or not taking the title arugment(?) So, I reverted to the older version of dash_renderer and other packages, the title of the graphs is back.