The issue stems from an incorrect or malformed structure within the `NSExceptionDomains` configuration. The `NSExceptionDomains` structure is expected to follow a specific format, which includes a dictionary of domain names or IP addresses, each associated with a dictionary specifying various security-related attributes such as `NSIncludesSubdomains`, `NSExceptionAllowsInsecureHTTPLoads`, `NSExceptionMinimumTLSVersion`, and `NSExceptionRequiresForwardSecrecy`. Failing to conform with this expected structure may lead to security vulnerabilities or unexpected behavior in the application.

#### Correct example : 

=== "XML"
 ```xml
    <dict>
        <key>NSExceptionDomains</key>
        <dict>
            <key>test.io</key>
            <dict>
                <key>NSExceptionAllowsInsecureHTTPLoads</key>
                <true/>
            </dict>
            <key>example-mobile.com</key>
            <dict>
                <key>NSExceptionAllowsInsecureHTTPLoads</key>
                <true/>
            </dict>
        </dict>
    </dict>
 ```

#### Incorrect example : 

=== "XML"
 ```xml
    <dict>
        <key>NSExceptionDomains</key>
        <dict>
            <key>test.io</key>
            <string>test</string>
            <key>example-mobile.com</key>
            <dict>
                <key>NSExceptionAllowsInsecureHTTPLoads</key>
                <true/>
            </dict>
        </dict>
    </dict>
 ```
