During debugging why some features in phpMyAdmin do not work, we've discovered that the curl extension as shipped with wampserver does not use system stored certificates. This is caused by curl not being built with native ssl library (Schannel). Is there chance to get this fixed to make curl usable with https as well?
See https://github.com/phpmyadmin/phpmyadmin/issues/12846#issuecomment-274313234
There is curl documentation on the topic as well: https://curl.haxx.se/docs/sslcerts.html