Pressing New Server button in an OACI subscription takes a long time to respond, the page loads more than 30 seconds.
The account in question owns a large amount of OACI subscriptions.
The issue is recognized as POA-109426 ('New server' screen takes 20-30 seconds to load in CCP for a large account).
Contact your TAM or PTA to trace the status of the problem.
There are no workarounds to increase the page load times.