An SSL error on an iPhone occurs when there are issues with the browser cookies and cache, which need to be cleared out. There are different forms of SSL errors that can occur while working on the internet, but this error comes up while working with the browsers on your iPhone or iPad. Having an SSL error on your iPhone prevents you from browsing a website over HTTPS, and as there is no SSL certificate involved in the process, your device might be at risk, or the website wont open.

There are many factors that can cause an SSL error on an iPhone, including outdated iOS or Safari browser, incorrect date and time settings, outdated, invalid, and expired certificates installed on the device, and interference from the network/router. Here are some ways to fix SSL errors on an iPhone:

1. Clear browsing history and cache: Clearing out cookies and cache can help fix SSL errors on an iPhone.

2. Update iOS and Safari: Ensure that both your iPhone’s iOS and Safari are up-to-date. To update iOS, go to Settings > General > Software Update. To update Safari, check the App Store for any available updates.

3. Enable SSL: Enabling SSL can fix SSL Connection Errors. Go to Settings > Safari > Advanced > Website Data, and ensure that the “Block All Cookies” option is switched off. This enables SSL and allows Safari to access secure websites.

4. Check date and time settings: Incorrect date and time settings can also cause SSL Connection Errors. Ensure your iPhone’s date and time are set correctly. Go to Settings > General > Date & Time, and toggle “Set Automatically” to ensure your iPhone’s date and time are set to the right time zone.

5. Reset network settings: Resetting your iPhone’s network settings may resolve SSL Connection errors that are due to network settings. To do this, go to Settings > General > Reset > Reset Network Settings.

6. Disable VPN: If you’re using VPN on your iPhone, it can also interfere with the SSL connection, leading to the “SSL error iPhone” issue. Try temporarily disabling your devices VPN service, and see if the issue is resolved.

7. Update the OS of your iPhone: You may encounter the SSL error on an iPhone if the OS of your phone is outdated as it can cause incompatibility between your phone and other related modules (especially, websites) which use the latest SSL version but the phone is still on the older version (due to outdated OS). In this case, updating the OS of your iPhone to the latest build may clear the SSL error.