Have you tried a private/incognito browser window, and no ad blocker?
Have you tried a different browser?
Personally I use Waterfox, which is a browser based on Firefox, but lighter.
In the attached image I see that it indicates to wait 3 working days and try to log in again to get the free license and access to the download. If the user is new, this could be the cause of the delay.
If your server is branded (HPE, Lenovo, Dell) with the type and model you can get the custom ISO from that manufacturer or VMware.
When installing VMware vSphere by default you will have a 60 days demo license.