Hi Shane! Thanks for your response!
At last the it was an wordpress core issue and it solved now. In Greece state is optional and that was the issue.
Here is the fix https://github.com/woocommerce/woocommerce/pull/23365
best regards
Hi Andrew, thanks for your message! I installed a demo shop here https://yeometry-labs.com. The previous one had htaccess security. Only stripe plugin is installed (in testing mode) along with woocommerce.
I have also added the ticket in my account at woocommerce and created a user account as inspected there.
Thanks!