I have the very same problem... Trends page does not load. I tried it in Chrome as well as in Safari, with different macOS versions, different macs, cleared caches, anonymous mode... nothing helps.
Errors from Chrome dev console:
main.4ebf7eb1.js:2 No route found https://appstoreconnect.apple.com/trends
(anonymous) @ main.4ebf7eb1.js:2
iris/v1/ciProducts?filter[productType]=FRAMEWORK&limit=333&fields[ciProducts]=name:1 Failed to load resource: the server responded with a status of 404 ()
trends:1 Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0
at parse (<anonymous>)
2main.bd9a4dd8.js:1 Metrics config: No config provided via delegate or fetched via init(), using default/cached config values.
(anonymous) @ main.bd9a4dd8.js:1
main.bd9a4dd8.js:1
Metrics config: No config provided via delegate or fetched via init(), using default/cached config values.
(anonymous) @ main.bd9a4dd8.js:1
main.bd9a4dd8.js:1 Object
main.bd9a4dd8.js:1 metricskit initialized
main.bd9a4dd8.js:1 Deprecation warning: use moment.updateLocale(localeName, config) to change an existing locale. moment.defineLocale(localeName, config) should only be used for creating a new locale See http://momentjs.com/guides/#/warnings/define-locale/ for more info.
(anonymous) @ main.bd9a4dd8.js:1
trends:1 Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0
at parse (<anonymous>)
service-worker.js:117 [Service Worker] Fetch Error TypeError: Failed to execute 'fetch' on 'WorkerGlobalScope': 'only-if-cached' can be set only with 'same-origin' mode
at service-worker.js:114
(anonymous) @ service-worker.js:117
The FetchEvent for "https://appstoreconnect.apple.com/trends" resulted in a network error response: an object that was not a Response was passed to respondWith().