we have a button that creates a PDF invoice for products, at the moment it pulls in some contents and leaves the rest blank. It used to pull in everything and I'm not sure what's wrong. Can anyone help?

 Thanks in advance

I am going after the Lightning Experience roll-out specialist badge and I am having issues with challenge #10. Could you give me some pointers on how to finish this challenge?  

Here is my error : The Lightning component named TrailheaDX must open a link to https://developer.salesforce.com/trailheadx/, must open in a new window (using the target attribute of ui:outputurl), and must be included in the Sales app. 

Here is my code 

Component : 

<aura:component implements="flexipage:availableForAllPageTypes" access="global" >
    <aura:attribute name="myURL" type="String" default="https://developer.salesforce.com/trailheadx/"/>
    <br/><br/>
    <ui:outputURL value="{!v.myURL}" label="TrailheaDX" target="_blank"/>
    <br/>
</aura:component>



Controller : 


({
    navigate : function(component, event, helper) {
        var address = component.find("address").get("v.myURL");
        var urlEvent = $A.get("e.force:navigateToURL");
        urlEvent.setParams({
            "url": 'https://developer.salesforce.com/trailheadx/' + address
        });
        urlEvent.fire();
    }
})




In addition, i added the app to the utility bar and the homepage of the lightning sales app. 

Could you give me any pointers on how to finish this challenge? 

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Hi, I recently started learning salesforce, thereforeI am a complete beginner. So I started using the trailheads. I had a problem already with the first challenge. I need to amend a contact field. When I go to the object manager, then fields, then I click new and I get a blank page in the object manager window and I cant do anything. I tried refreshing it many times but nothing changes. I noticed that I get many of these blank windows. I am so far quite frustrated but I dont want to give up quickly. Thanks for your help.