You’re absolutely correct about the access key. With respect to my catalog, I’m afraid I have the same problem even in the Sandbox Dashboard. I just executed a ListCatalog from the API explorer, it revealed that there are two items in my Catalog:
{
"objects": [
{
"type": "ITEM",
"id": "AH6EYPL6MZ7H7XUA2MZ6N5EJ",
"updated_at": "2020-10-27T14:39:08.834Z",
"version": 1603809548834,
"is_deleted": false,
"present_at_all_locations": true,
"item_data": {
"name": "Culeothesis Necrosis",
"description": "Will eat your face.",
"abbreviation": "CULNEC",
"label_color": "A52A2A",
"available_online": true,
"available_for_pickup": true,
"available_electronically": true,
"product_type": "REGULAR"
}
},
{
"type": "ITEM",
"id": "NNFRBK5RAWULWWR3FE4ML3MQ",
"updated_at": "2020-10-27T18:57:58.372Z",
"version": 1603825078372,
"is_deleted": false,
"present_at_all_locations": true,
"item_data": {
"name": "Culeothesis Necrosis",
"description": "Will eat your face.",
"abbreviation": "Cul",
"label_color": "A52A2A",
"available_online": true,
"available_for_pickup": true,
"available_electronically": true,
"product_type": "REGULAR"
}
}
]
}
But as you can see, the relevant sandbox space is empty:
This is for an entirely new app I made, with name caliskunk, ID sandbox-sq0idb-4jMU5yV5e77-2cqM9IxHEA, connected to test account Jason - Sandbox. I tried to refresh everything in case there was something up with my app configuration.