• Jsingh
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In Lightning App Builder module  I hade finished all challenge of this module in my trailhead playground.but when i came in last challenge '"work with custom lightning component" i am not able to install the unmanaged package "Contacts Today" in my playground.it is giving following error

"This page has an error. You might just need to refresh it. afterRender threw an error in 'lightning:accordionSection' [Cannot read property 'dispatchEvent' of null] Failing descriptor: {lightning:accordionSection}"
and
when i close it
it display

"This app can't be installed.
There are problems that prevent this package from being installed.
You cannot install an unlocked package without a namespace into an org with a namespace".
Done
Please help me solve this
Regards
Jyotsana
hi

when ever i am trying to launch my trailhead playgroun (old or new one)  following error comes
[This site can’t be reached
curious-raccoon-og38f6-dev-ed--c.documentforce.com’s server IP address could not be found.
Try running Windows Network Diagnostics.
DNS_PROBE_FINISHED_NXDOMAIN]
 please help me out i was trying from yesterday.
Thanks
jyotsana


 
Hi, I am having trouble with the "Attributes and Expressions" module from trailhead.

Here is the challenge:
Create a Lightning Component to display a single item for your packing list.
  • Create a component called campingListItem that displays the name (ui:outputText) and the three custom fields using the appropriate output components.
  • Add an attribute named 'item' for type Camping_Item__c.
I created an component named campingListItem and this is the code:
<aura:component >
    <aura:attribute name="item" type="<my_domain>__Camping_Item__c"/>
    
    <ui:outputText value="{!v.item.Name}"/>
    <ui:outputCheckbox value="{!v.item.<my_domain>__Packed__c}"/>
    <ui:outputCurrency  value="{!v.item.<my_domain>__Price__c}"/>
    <ui:outputNumber value="{!v.item.<my_domain>__Quantity__c}"/>
</aura:component>

The error that I am getting is: "Challenge Not yet complete... here's what's wrong: 
The packingListItem Lightning Component's attribute tag doesn't exist or its attributes are not set correctly."

With this, I tried to create another component, with the name "packingListItem", but It didn't work.

Can anyone help me?

Thanks,