We don’t have SourceGuardian installed on our servers. We do have the (more popular) IonCube installed though, but that’s not going to help you here.
That said, the Elementor Pro plugin itself doesn’t seem to be encrypted with SourceGuardian, and Elementor doesn’t list that module as a dependency. The only thing in the installation that uses is is this abzarwp.php script, which doesn’t look like it’s part of Elementor itself.
I suspect that your Elementor Pro installation is a pirated copy, and the abzawp script is malware added to it by the redistributor.
This is why you should never use pirated software, very often you’re installing something you don’t want along with it, and get your website hacked.
If you want to use Elementor, that’s fine, but either pay for the paid version, or stick to the free version.