"No inventory found" - despite 150+ products with "track quantity" selected on variants

I have “track quanity” checked for all my products/variants. Yet I see no inventory on this page. Any help ?

I don’t see any inventory on the admin inventory page. But when I click Export, I do see all my products/inventory. What am I missing?
There are no filters on.

Maybe related.
There’s an error in my browser console:

Access to fetch at ‘https://business-platform.shopifycloud.com/destinations/api/2020-07/graphql’ from origin ‘https://----.myshopify.com’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. If an opaque response serves your needs, set the request’s mode to ‘no-cors’ to fetch the resource with CORS disabled.> vendors~main-27fa86143b59bad3e2cee063392a6e634e2aacfcadf37ff3875674c1045e85dc.js:2 POST https://business-platform.shopifycloud.com/destinations/api/2020-07/graphql net::ERR_FAILED

It appears to be an issue on a particular network. So I’m thinking that it is caused by my company firewall.