Thanks @drwpcom !
Yes I have AIWPS installed with 6G firewall rules enabled on that site.
I will test further and confirm if it is indeed the cause of the issue.
I still have this issue. Both WooCommerce (4.2.0) and WooCommerce Admin (1.2.4) are active and latest versions are installed, as well as WordPress (5.4.2).
If I disable/delete WooCommerce Admin, Analytics does not work at all, a blank page is shown for each item in the Analytics menu.
My solution is to have WooCommerce Admin installed and activated for Analytics to remain functional.
Is there a fix for this issue in sight?