Still not appearing on Open Sea

It seems as thought there is no connection to open Sea. Setting a price does not reflect the price on openSea. THere are no images that appear despite me checking hotlinking and https settings.

Maybe it is a JSON issue?
Endpoint URL sample can be found here:
{
“id”: “30”,
“description”: “asdad”,
“attributes”: [
{
“trait_type”: “creator”,
“value”: “@admin”
},
{
“trait_type”: “last_modified_gmt”,
“value”: “2021-05-25 03:47:53”
}
],
“media-type”: “image”,
“external_url”: “https:\/\/croydon.io\/nft\/sdasd\/”,
“author_id”: “1”,
“author_external_url”: “https:\/\/croydon.io\/nft-authors\/?a=1&id=18”,
“author_avatar”: “https:\/\/secure.gravatar.com\/avatar\/69981d6366f3ff25036890b2883f6cf5?s=96&d=mm&r=g”,
“author_account”: “0x4e7d969495dfb18e836a9d55682bb04f8e103e84”,
“nft_id”: “5”,
“network”: “Rinkeby”,
“network_url”: “https:\/\/rinkeby.etherscan.io\/token\/0x54596fD35aF14f65Aa94cB194b3226d751ae38Fd?a=5”,
“image”: [
“https:\/\/croydon.io\/wp-content\/uploads\/2021\/05\/film.gif”
]
}` “name”: “sdasd”,
`