Webview: Failed to validate the certificate chain

I'm trying to open my website https://beta.truckerdistrict.com in a react native app and it's giving me a white screen without any error or alerts in UI. I tested https://facebook.com and other and all is working fine. Checking logs I found the following error:

Failed to validate the certificate chain, error: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found

Here is my webview code, it's really simple without anything special:

<WebView
        ref={this.WEBVIEW_REF}
        userAgent={this.USER_AGENT}
        javaScriptEnabled={true}
        uploadEnabledAndroid={true}
        allowUniversalAccessFromFileURLs={true}
        mixedContentMode="always"
        onNavigationStateChange={this._onNavigationStateChange}
        onLoadEnd={this._onLoadEnd}
        onError={this._onLoadError}
        onMessage={this._onWebMessage}
        source={{uri: this.BASE_URL}}