Getting the message: “There are no delivery options available…”at checkout

Hi, I was wondering if you can give me a hand. I am trying to make Shipping Zones by Drawing (Premium) work at the checkout page.
Here are the details:
Problem: I always get the message “There are no delivery options available. Please make sure your address was entered correctly or contact us if you need assistance.” in the checkout page where it should show me the price
Specs:
wp 5.8.2
WooCommerce 6.0.0
Shipping Zones by Drawing Premium for WooCommerce 2.6.0.2 (bought with this address dm@temponet.ro)

What I have done:
1 Inserted the api key according to the documentation from the plugin;
2 Made the settings as in the attached picture, and selected the location of the store from the map;
3 Created a single shipping zone for my city and added a flat rate for this;
4 Selected as a method Shipping Zones By drawing and the delivery zone that I created before, as in the attached picture.

I also checked the general settings to be sure that the delivery is enabled for my country and everything seems to be ok.

Thank you.

Image links:
https://ibb.co/CJf241k
https://ibb.co/rd2xyzK
https://ibb.co/0s8xDc1