Update Plugins Warning Error

I would like to ask about how to fix this problem:

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Warning: An unexpected error occurred. Something may be wrong with www.ads-software.com or this server’s configuration. If you continue to have problems, please try the support forums. (WordPress could not establish a secure connection to www.ads-software.com. Please contact your server administrator.) in /home/admin18/public_html/wp-includes/update.php on line 119

All updates have been completed.
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