'API-umbrella Install Error ERROR: SSL verification error at depth 1: unable to get local issuer certificate (20)

Hi When I've installed Api-Umbrella by source code I got the Error messages like

ERROR: SSL verification error at depth 1: unable to get local issuer certificate (20) ERROR: You must add /OU=GlobalSign Root CA - R3/O=GlobalSign/CN=GlobalSign to your local trusted store ERROR: While executing gem ... (Gem::RemoteFetcher::FetchError) SSL_connect returned=1 errno=0 state=error: certificate verify failed (https://api.rubygems.org/specs.4.8.gz) task: Failed to run task "default": task: Failed to run task "all": task: Failed to run task "deps": task: Failed to run task "deps:rubygems": exit status 1

I know this is occured cannot install rubygem but I don't know how to fix it. I cannot use root authority because of security. Please help me thank you.



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