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[smnayeem]

I am just trying install to start Magento 2.1.5 through Softaculous in c-panel. It showing successfully install and also can access Front end. but after login back end admin panel it showing an error. what is the solution?

Error is here: 

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Warning: is_dir(): open_basedir restriction in effect. File(/etc/pki/tls/certs) is not within the allowed path(s): (/home/neelnod:/usr/lib/php:/usr/php4/lib/php:/usr/local/lib/php:/usr/local/php4/lib/php:/tmp) in /home/neelnod/public_html/vendor/composer/composer/src/Composer/Util/RemoteFilesystem.php on line 914

 Error log record number: 236623617362

[Sinisa]

You'll have to add:

/etc/pki/tls/certs

into php.ini, within open_basedir.

Since you're using cPanel, you'll probably have option to add it through cPanel by going to:

Main >> Security >> Security Center >> open_basedir protection.

If you've using managed server, you'll probably have to reach to your hosting support in order to do that for you.