Ajax error with WPO365 plugin

[AGEPCom]

Hi,
I have this error “There was a problem – Ajax Error” while submitting to a form on my site.
I disabled all plugins and found that WPO365 | MICROSOFT 365 GRAPH MAILER (https://fr.wordpress.org/plugins/wpo365-msgraphmailer/) seems to be the problem.
So I have this error notification but I receive my notification in my mailbox.

Is there any way to fix this error and display a confirmation ?

Thanks for your reply.

[Ally]

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[AGEPCom]

Hi,

Thanks for your quick answer.

So we checked from our local environnement, it worked well; it seems to be our Apache settings:
Content-Security-Policy: frame-ancestors ‘none’ –> cause an ajax error but the notification is sent
We change to :
Content-Security-Policy: frame-ancestors ‘self’ https://sitename.com

It wasn’t WPO365 plugin at all !

Thanks,

[Ally]

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