Resolve "Site Not Secure" Warning

Job ID: 40468434

Budget: €8 – €30 EUR

Visitors who open neo-vista.ch in Google Chrome are greeted with the red “Site not secure” warning page. I have not touched the hosting, DNS records, or SSL certificates recently—only routine WordPress core/plugin updates—yet the alert suddenly appeared.

I need you to:
• trace the exact reason Chrome is flagging the site (expired or mis-issued certificate, mixed-content call, HSTS conflict, or anything else);
• implement the fix so every URL (www and non-www, http and https) loads cleanly without security warnings;
• keep our current WordPress setup, content, and design intact.

Acceptance criteria
1. neo-vista.ch and all internal pages open in Chrome with the standard padlock, no “Site not secure” or equivalent interstitial.
2. SSL Labs or a similar public checker reports the certificate chain as trusted and up-to-date.
3. A brief summary of the root cause and steps you took so I can document the change.

Access to cPanel, WordPress admin, and the current certificate panel will be provided on approval.
Related categories: PHP JavaScript Web Security WordPress DNS Web Development SSL cPanel