i recently had the update progress box come up after i stopped HDP and restarted it during a maintenance window. It took a few mins but did go away and let me get into the app. I think the app bring version 1 of a new design has some bugs.
for example im noticing hdp is slower then the old app that opened in its own tab. Over time im guessing they will optimize the app and hopefully resolve these issues.
we probably should have a separate thread for new hdp/netbak to list suggestions, bugs etc. so everyone can track whats going on with it.