SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

Hi Folks,

since a couple days (Flickr ssl changes on June 30th?) the plugin is not working anymore on my webhost All-Inkl.com – I get this error:

Awesome Flickr Gallery Error – SSL certificate problem, verify that the CA cert is OK. Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

I did some tests on different webhosts and kindly ask you: what does my webhost need to change for me so that it works again?

My tests: After three fresh installs (WP 3.9.1 and AFG 3.3.5) on 3 different webhosts the results are, that only on my current webhost it does not work. I want to refrain from migrating all my five websites from this webhost to a new webhost :-((

https://wptest.spyhunter.org.uk WORKS!
PHP-Details: https://spyhunter.org.uk/phpinfo.php

https://jimbo.square7.ch WORKS!
PHP-Details: https://jimbo.square7.ch/phpinfo.php

https://roesner.tv/WPTEST/ DOES NOT WORK!
PHP-Details: https://roesner.tv/WPTEST/phpinfo.php

I’ve got no clue what my webhost All-Inkl.com should change for me so that it works again! All-Inkl.com’s support doesn’t help me at all – they merely tell me to ask the developer / wordpress.

Any hints are highly appreciated!

Regards, Jan

https://www.ads-software.com/plugins/awesome-flickr-gallery-plugin/