It looks like you have a couple of issues that are easy to resolve:
1) The module is looking for java actions in the CommunityCommons app store module which you do not have. Download the app store module Community Commons to fix this
2) Some pages contained within the PushNotification widget are looking for the layouts 'NavigationLayout.PopupLayout' This is because the default Mendix page layouts used to be in a module called NavigationLayouts but if you created a Mendix project that uses Atlas UI instead (this is the default these days) Then those master layouts have different names. Click on the error row to open up the page. Then open the 'Properties' tab and select the Layout. Pick a different layout from your Atlas UI folder to replace the NavigationLayout selection. This will fix your issue.