I went to drupal.org, copied the link for the Devel module, went to my site, New Module (under extensions) paste the link into the "Install from a URL" and when I hit Install it gives me the following error message: "Failed to fetch file due to error "cURL error 77: SSL: can't load CA certificate file /Applications/DevDesktop/common/cert/cacert.pem (see http://curl.haxx.se/libcurl/c/libcurl-errors.html)" Unable to retrieve Drupal project from https://ftp.drupal.org/files/projects/devel-8.x-1.0-rc1.tar.gz."

How can I fix this?

  • 1
    You can get around it for now by downloading directly from drupal.org, opening the file and placing the contents in /modules. – Kevin Mar 13 '17 at 18:18

Restarting the server work for me

you might want to consider just restarting apache server only

otherwise you might have to follow the solution here https://www.drupal.org/node/2481341

- Download latest cacert.pem from http://curl.haxx.se/docs/caextract.html.
- On global PHP level add curl.cainfo = [enter your path]\cacert.pem to your php.ini.
- Restart Apache service.
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Download this file http://curl.haxx.se/ca/cacert.pem save it on the desktop.

Then Copy( or move) into the C:\Program Files (x86)\DevDesktop\common\cert\

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