Also, I was unable to activate my publication. After I disabled protection, activation screen opened. Generated activation key is not recognized by the publication.
Can you send us your HEPX project file for internal testing please? If yes, you can zip it and upload the archive to https://wetransfer.com
This is a free file hosting service: after upload, they will give you a URL. Please send us this URL so that we can download the Zip archive. Private mail is also possible. Thanks!