Hello–
I contacted SiteGround support. They said:
I was able to reproduce the message which you got for Incompatible plugins: BackWPup, Events Manager Pro, Ninja Kick: Contact Form, WP File Download.
Based on your reply regarding your web developer – ‘I contacted the developers and all four report that their plugins are in fact compatible with this and later versions of PHP”,
please contact the developer and request to send an email to [email protected] (with CC to [email protected]). In the email, your developer needs to include the plugin version and the information what he thinks might be triggering our
compatibility checker false-positive results.
The email address [email protected] is on our SG Optimizer developer who will be glad to review the case and consult with your developer regarding the issue and the email.
FYI.
–Jim