Unable to download trial version of F5 VE edition.

You may find some additional explanatory details (and instructions) in this AskF5 article: K59533861: Export compliance check failure. The key reason for the error is described as followed: "Exports to entities listed on a U.S. government denied party/prohibited end-user list may be prohibited or proceed only if they have been licensed. In addition, F5 uses IP geolocation data provided through Digital Element (a third-party vendor) to discover user locations and ensure that parties from sanctioned or embargoed countries are restricted from accessing software upgrades, bug fixes, and so on."

Hope this helps.