version 5.9.8 wont send emails

Here is server and database info:

Server architecture Linux 4.18.0-513.24.1.el8_9.x86_64 x86_64
Web server Apache
PHP version 8.2.21 (Supports 64bit values)
Extension mysqli
Server version 10.5.25-MariaDB
Client version mysqlnd 8.2.21

Where can we see the website in question?

https://mrlvi.fi/

Where on the site do you have the form having the issue?

https://mrlvi.fi/palautukset-ja-reklamaatiot/

Do you get any response message after you submit the form?

Yes, I got an orange or red error message, I can’t remember which. Let me know if you want to know which message it is, and I’ll install the new version again and test.

Hi,
I’m having the same problem as @niunuli
I’ve installed the previous version, 5.9.7 with WP 6.6.1, but it still doesn’t send.
To solve this problem I’m creating forms from my Theme option, but please, we need to know what the solution is. We have many websites updated to the latest version of Contact Form 7 (5.9.8) and it seems that the error is repeated.

My form started working with version 5.9.8. I updated the add-ons and the theme and at the same time thought to try what color error the form gives, but the form was sent successfully. So the problem was in some other add-on or theme…