2.14.1.1.13. Error "SSL certificate problem: unable to get local issuer certificate"

When performing some operations in WordPress admin panel, such as installing or updating plugins, you may get the error "cURL error 60: SSL certificate problem: unable to get local issuer certificate". The reason is the outdated certificates of WordPress itself.

To fix the situation, you need to download the actual ca-bundle.crt certificate file from official WordPress repository (follow the link and click "⋅⋅⋅⋅ → Download" in the upper right corner) and replace it with a similar file in the site directory at the path /wp-includes/certificates/ca-bundle.crt (or simply edit this file and replace its contents).

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