Hello Nintrara starts

Please note that the only supported language is English, so please translate your future responses.

I don't understand what I'm being offered as a translation by Google Translate:

Access anytime, anywhere

Automatic appointment reminders Automatic synchronization with other calendars

All appointments in your business are always synchronized and always available in your personal calendar. For example, on the way to work you can already see which customers can be expected at what time.

Receive no notification of online booking 

Automatic appointment reminders via email

Contact form does not work, do not receive messages from customers

From the last 3 lines, I can assume your notifications don't work, correct?

Issue with email notifications could be caused by several reasons:

1. Your hosting provider is blocking all 3rd party settings, and only allowing their SMTP (or other) settings. 

2. Your website has PHP version less than 7 

3. The credentials are not correct 

4. There's something else blocking the notifications from being sent

5. If you're using Gmail, please make sure you've enabled "Allow less secure apps" in your Google account

Please check these points, and let me know if you were able to resolve the issue.