Failed to get installation parameters of a WordPress website: No versions available

[Roland]

I have installed the WordPress toolkit, and when I go to the WordPress screen and press Install to add a new WordPress site, the form that pops up gives the following error:
"Failed to get installation parameters of a WordPress website: No versions available"

When checking /var/log/plesk/panel.log, I see this:
[2019-11-27 16:51:39.742] ERR [extension/wp-toolkit] Unable to retrieve data by "https://api.wordpress.org/core/version-check/1.7/"

I have tried
curl https://api.wordpress.org/core/version-check/1.7/, this works
wget https://api.wordpress.org/core/version-check/1.7/, this gives a certificate error, but that may be unrelated

I hope someone can help me, as right now, the WordPress Toolkit isn't working.

Plesk Onyx Version 17.8.11 Update #74, WP Toolkit version 4.3.4-2520

 

[Roland]

After searching for the last couple of days, just after posting this I stumbled upon the solution in this unrelated thread:
Resolved - Issues with Grafana / Advanced monitoring
It seems the openssl installation was corrupted, reinstalling fixed the issue.

# mv /usr/lib/ssl /root/ssl.saved
# apt-get install --reinstall openssl ca-certificates