The DK0021 is due to that network error I mentioned when DevKinsta tries to use cURL to download WordPress. Something with your system or network is blocking the cURL request. If you cannot configure your network then you will need to add the WordPress files manually.
If you populate the ~/DevKinsta/wp/ folder with extracted WP installs, DevKinsta will not try to download those ZIP files and should move on to the next step.
That folder is supposed to look like this:
With each ZIP extracted:
You can see exacly where the WP download is failing in your main.log. Here are links to the files that need to be downloaded:
https://wordpress.org/wordpress-6.0.zip
https://wordpress.org/wordpress-6.0.1.zip
https://wordpress.org/wordpress-6.0.2.zip
Please download and extract each WP version and make sure the folder names match what I have. After this, please try creating a site again and share your main.log files with me so I can see the new errors, if any.