I have created a new App for one of trailhead assignment:- Admin Intermediate>  Build a Battle Station App> Create Reports and Dashboards
 However, when I went ahead to create 'New Report' the tab is not available. What should I check for, all my setting are fine and have "allow report" is checked on each object. 
Please help. Here is screenshot

<apex:pageBlockTable var="exp" value="{!listOfExpense}">
<apex:outputLink value="/{!exp.Id}" target="_blank">{!exp.Name}</apex:outputLink>
        <apex:repeat value="{!fieldSetMember}" var="fs">
                 <apex:column value="{!exp[fs]}" />
                         
          </apex:repeat>
 </apex:pageBlockTable>

 

<apex:pageBlockTable var="exp" value="{!listOfExpense}">
<apex:outputLink value="/{!exp.Id}" target="_blank">{!exp.Name}</apex:outputLink>
        <apex:repeat value="{!fieldSetMember}" var="fs">
                 <apex:column value="{!exp[fs]}" />
                         
          </apex:repeat>
 </apex:pageBlockTable>

 

how can I open my Trailhead playground?
how to get object manager tap?

I have created a new App for one of trailhead assignment:- Admin Intermediate>  Build a Battle Station App> Create Reports and Dashboards
 However, when I went ahead to create 'New Report' the tab is not available. What should I check for, all my setting are fine and have "allow report" is checked on each object. 
Please help. Here is screenshot