I've added this card data to this site:
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="Firefly Semantics Long Lead Time Capital Intensive Low Demand Service Parts Profit Optimization Help Center">
<meta name="keywords" content="Long, Lead, Time, Capital, Intensive, Service, Parts, Profit, Optimization, aerospace, heavy, industries">
<meta name="author" content="Ole Ersoy">
<meta name="description" content="Page description. No longer than 155 characters." />
<!-- Twitter Card data -->
<meta name="twitter:card" content="Firefly Semantics Long Lead Time Capital Intensive Low Demand Service Parts Profit Optimization Help Center">
<meta name="twitter:site" content="https://help-service-parts.fireflysemantics.com/">
<meta name="twitter:title" content="Firefly Semantics Service Parts Help">
<meta name="twitter:description" content="Firefly Semantics Long Lead Time Capital Intensive Low Demand Service Parts Profit Optimization Help Center">
<meta name="twitter:creator" content="@fireflysmtics">
<-- Twitter Summary card images must be at least 120x120px -->
<meta name="twitter:image" content="https://fireflysemantics.github.io/logo/service-parts-help-center/fs-logo-help-center.png">
However when I paste a link into my twitter account the card does not render.
https://twitter.com/fireflysmtics
It does Render on medium. Any ideas?
Here's an example medium article with the card rendering at the end:
https://medium.com/@ole.ersoy/capital-intensive-concept-c565b5b5eade
It also renders fine on Facebook.
I found this resource:
https://cards-dev.twitter.com/validator
Put when I put the URL in it just says:
ERROR: Invalid card name (Card error)
The Twitter card can't have any random data in it. There are specified values that are allowed right now"
summary
summary_large_image
app
player