Unable to render card preview

[Ringer_Alarm]

Hi,
I am using below codes under head section of the html codes of my website www.billei.com

When I go to card validator, I am getting below error

INFO: Page fetched successfully
INFO: 12 metatags were found
ERROR: No card found (Card error)

Please assist.

[Ringer_Alarm]

It’s working here but not on twitter

What if Universe is Nothing but the Strongest Imaginations Manifesting...

Below are the codes I am using under head section

<meta content='summary' name='twitter:card'/> 
<meta content='@Billei_Reporter' name='twitter:site'/> 
<meta content='@Billei_Reporter' name='twitter:creator'/>
<b:if cond='data:blog.pageType == &quot;index&quot;'> 
<meta expr:content='data:blog.url' name='twitter:url'/> 
<meta expr:content='data:blog.pageTitle' name='twitter:title'/> 
<b:else/> 
<meta expr:content='data:blog.homepageUrl' name='twitter:url'/> 
<meta expr:content='data:blog.pageName' name='twitter:title'/> 
</b:if>
<b:if cond='data:blog.metaDescription != &quot;&quot;'> 
<meta expr:content='data:blog.metaDescription' name='twitter:description'/> 
</b:if>
<b:if cond='data:blog.postImageThumbnailUrl'> 
<meta expr:content='data:blog.postImageThumbnailUrl' name='twitter:image'/> 
<b:else/> 
<meta content='https://3.bp.blogspot.com/-RtyWKwfjRW8/Wi0gI7kItnI/AAAAAAAAAIE/kaD6PtXWV_QTpUS3RJHH7lmuhpiMlaZ1QCK4BGAYYCw/s113/1511631153273.JPEG' name='twitter:image'/> 
</b:if> 
<meta expr:content='data:blog.homepageUrl' name='twitter:domain'/>

[system]

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