Resolving timed out after 10561 milliseconds

Hello there,

Thanks for this very useful plugin! I’m using it to add subscribers to MailerLite.

Unfortunately, it does not work 100% of the time on my website. The error log contains messages like this:
cf7connector_system.ERROR: “Aanmelden nieuwsbrief” [2192]: MailerLite subscription is failed: Error: Resolving timed out after 10561 milliseconds

After some Google-ing, I believe this error indicates a DNS timeout occurred. For this reason, I have already contacted my hosting provider about this problem. This is what they have told me:

Let me also explain that our scope of support is mostly related with the server and we are actually not trained on website configuration and development. In that case from what I see the problem is related with the website configuration , that is why the best way of action will be to double check the issue with the plugin support, so they can guide us better what exactly on server side is needed , so we can help regarding their instructions

Have you seen this error before? If it is something my hosting provider should fix, what exactly should they change?

Thank you in advance!

P.S. I noticed when this time out happens, the user sees a success message in the CF7 form, even though the operation actually failed.

The page I need help with: [log in to see the link]