I have no idea what a JEvents cPanel is.
When attempting to create an event whilst logged in as a Super Administrator, then you probably:
enabled authorised user mode for event editing/creation
Enabled authorised user mode for event editing/creation (JEvents Configuration -> Permissions)
And did not set up the Super Admin user as an authorised event creator, in JEvents cPanel -> Authorised Users.
To fix this you should setup the Super Administrator as an authorised event creator through JEvents cPanel -> Authorised Users or disable authorised user mode and use the Joomla! ACL.
Event creation permissions (and other config options) are described in the configuration documentation available to all club members (bronze, silver and gold) available from here.