This is due to the Energy Analytical Model (EAM) being recreated in Revit. While this is happening, it will prevent the application from updating. Please be patient while the Energy model recreates or go to the Analyse Tab in Revit and delete the Energy Model and Create a new one. You may also close and reopen the application which will initiate a new Energy Model.
If the model is changed substantially while the application is open (glazing is created or deleted or geometry is altered), you may need to go back to the Building Manager to Calculate Solar Loads again. In some cases it may be prudent to close the application, make the changes in Revit and then reopen the application to start afresh.