Hey, I just found out that there is also a way to get to the Shipping Manifests through the Apps section. For me, this loaded the manifest. So, instead of accessing it through the shipping label tab, go down to apps, the look for Shipping Manifests.
I did clear my cache, cookies, and browsing history, restarted the computer. That didn’t work, but going to the apps section did. I hope it helps you. If not, contact support.
