[Plesk 8.2] curl error SSL23...unknown protocol... License

[lgeoffrey]

Curl error: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol

#0 /usr/share/magicspam/php/includes/class.MagicSpamLicense.php(177): MagicSpamLicense::exec('update 'MSPLSK-...')
#1 /usr/share/magicspam/php/includes/sections/class.MagicSpamLicenseKeySection.php(42): MagicSpamLicense->update('MSPLSK-2222EE-S...')
#2 /usr/share/magicspam/php/includes/class.MagicSpamPage.php(55): MagicSpamLicenseKeySection->prepare()
#3 /usr/share/magicspam/php/includes/class.MagicSpamInterface.php(84): MagicSpamPage->prepare()
#4 /usr/share/magicspam/php/includes/class.MagicSpamInterface.php(77): MagicSpamInterface->prepare(Object(MagicSpamPage_settings))
#5 /opt/psa/admin/htdocs/modules/magicspam/index.php(75): MagicSpamInterface->run('settings')
#6 main

[lgeoffrey]

for record. I got this message from the support by email:
"According to our records, this particular license that you are attempting to register has already been registered to another server. Are you trying to transfer your license from one server to another? If so, we can certainly reset the license for you, but please be aware that any other server this license may be active on will terminate the MagicSpam functionality.
If you are attempting to install MagicSpam on a second server, you will need to purchase another license for use."

For information :
This is a new installation, with a new key, never used before.

Thank you for your help.

[magicspam]

For the record, this issue has since been resolved. The cause of the issue was a case of the installed Parallels Plesk RPC-API running on a non secure (http) channel as opposed to the normal (default) https channel. This is being worked through by the MagicSpam development team for final resolution.