Hi, I'm new here and I've been taking the "Salesforce JavaScript Developer I Credential" course and I've gotten stuck and I'm not sure how to proceed. 

I have a full explanation here: https://trailblazers.salesforce.com/answers?id=9064S000000Cqzn but here is a quick recap. I'm using "sfdx" v29+ and when I ran the "sfdx force:project:create" method and then followed the instructions in this task: https://trailhead.salesforce.com/content/learn/projects/develop-app-with-salesforce-cli-and-source-control/create-salesforce-dx-project?trailmix_creator_id=strailhead&trailmix_slug=prepare-for-your-salesforce-javascript-developer-i-credential

After getting this setup I went on to "Develop the Map Component". This task has you run this command: "sfdx force:source:push". The first time I ran this there was an error that I tracked down to incorrect XML after v29 in Property_Record_Page.flexipage-meta.xml where I needed to change <componentInstances> to <itemInstances><componentInstance>. Now when I run the command I get 

TYPE

Error

PROJECT PATH

force-app/main/default/flexipages/Property_Record_Page.flexipage-meta.xml

PROBLEM

We couldn't retrieve the design time component information for component c:PropertyCarousel.

I can't figure out from searching online how to resolve this issue. If I remove the XML definition for PropertyCarousel then it just throws this same error for a different component.