OneCalendar Contact Email? Found it - But still bug?

EDIT: I found your email addresses for contact but going on your main website: https://www.onecalendar.nl/support/contact

But in case you still want the information on how I couldn't obtain it while in app, look below.

ORIGINAL TEXT:

Looking for this information to save it off and keep for reference. But in attempting to find your contact email address, discovered the app was not providing it.

I am using the Windows desktop app. Windows 10. I obtained the app through the Microsoft Store and this includes when I purchased the Premium version. 

Application version: 2022.1021.1.0 (X64)  (Note that I did verify there were no app updates available to apply, therefore the app on my computer is up to date.)

OS Version: Windows 10 Desktop VIO.o.19045.2311

How I got there: Opened the Windows desktop app. Then clicked on Settings. Then clicked on About. And then clicked on "Contact Us". The third button says "Other Support" and "Email Us". But when I do click on that button, the only action that happens is a new browser tab opens up with basically nothing on it.

I've even hovered over this button to see if an email address showed but it doesn't.

What is your contact email address? If nothing else, for future reference.

Thank you, Cindy