Hi, I think I found the real root of the issue and I also think I already solved it.
Pls do as described here:
Navigate in your Server to the Folder /vendor/guzzle/guzzle/src/Guzzle/Http/Curl/
Edit the File Client.php
Navigate to line 140
comment it out! (adding // at the beginning)
Explanation:
Mollie is based on guzzle but unfortunely on a very old version.
This version does include a own cacert file (which is outdated) and uses it by default!
If you comment out the line it will fallback to the Systems cacert (which is up to date) and should work again.
Let me have a closer look into it the next days.
But if your issue now it the same as the one from the others, they have solved it, it seems so I asked them what they did so we can use the Patch/Fix for everyone
Comment out wil not the solution of your problem, Change that back to original state and change line 141 from true to false. Then it will work with Mollie again.