Regarding Part 2 in the Render a Visualforce Page Conditionally for the User Interface module of "Build Flexible Apps with Visualforce Pages and Lightning Components". 

Wrap the <apex:slds /> element with the following tag:
1<apex:outputPanel rendered="{! !isClassic}"> ... </apex:outputPanel>

I'm unfamliliar with what Wrap means in this context. I'm not a coder. 

For context, here is the entire portion of the step 

 

I am trying to do the Lightning Experience Chatter Basics for Admins trail. I am on the Approve Records from a Chatter Feed and when I try the challenge with creating the Approval Process, I am instructed to create the process and set the typing in Allison Wheeler does not work as the User does not exist. Should a new trailhead playground be created? 

I keep getting the following error message, even after trying in 3 new playgrounds: 
Challenge Not yet complete... here's what's wrong: 
Some billing state names do not meet data quality standards, or the data import was unsuccessful.

I followed all of the instructions:
1. Installed unmanaged package in the new playground
2. Added Residential picklist type to Accounts
3. Cleaned up Account list:
a. Removed "Household" from Account name (this wasn't specified, but it didn't seem necessary)
b. Removed duplicate records
c. Changed accounts in ALL CAPS to only cap first letter of first and last name
d. Changed state name to 3 letter State code
e. Saved as .CSV file
4. Imported list using Import Wizard

I received an email confirming the import was successful with 11 rows processed and I see the accounts when I search up accounts in the playground. 

Thanks in advance for any help!

I get this error: Challenge Not yet complete... here's what's wrong: 
The Suggestion custom object does not contain the correct set of custom fields. Tip: check for typos in the field names.

I've followed all steps, went back and rechecked, and then redid the entire challenge. I can't get it to pass. What am I doing wrong? I have included all custom fields and spelled them correctly.