Appium install ios self signed app issues(trust certificate, new driver hang up))

Hi appium experts,

Now i am using appium to install self-signed iphone app, but i encouter two issues, struggle with them:
Public code:
final DesiredCapabilities capabilities = DesiredCapabilities.iphone();

capabilities.setCapability(CapabilityType.BROWSER_NAME, "iOS");
capabilities.setCapability("browsertype", "iOS");
capabilities.setCapability(MobileCapabilityType.DEVICE_NAME, "testios1");
capabilities.setCapability(MobileCapabilityType.UDID, "3004b8dd0e186dff2abee4f4d2555a37397b7cf8");
capabilities.setCapability(MobileCapabilityType.PLATFORM_VERSION, "12.1.2");
capabilities.setCapability("autoAcceptAlerts", true);
capabilities.setCapability("waitForQuiescence", "false");
capabilities.setCapability("newCommandTimeout", "1800");

issue 1.
If install ipa with below two lines, the second line will hang up, never return the driver.The live.ipa is a self-signed app. How to fix it?
capabilities.setCapability(MobileCapabilityType.APP, “live.ipa”); //live.ipa is a self-signed app.
final IOSDriver driver = new IOSDriver(new URL(“http://10.182.62.110:4826/wd/hub”),capabilities);

issue 2.
i temporarily work around above hang up issue, so i just open settings page instead, after it return the driver, call driver.installApp(“live.ipa”) and then install certificate. But iphone popup error, like picture error.png. How to fix it?
As http://appium.io/docs/en/writing-running-appium/ios/ios-xctest-install-certificate/ says, Appium has a built-in HTTP server, but i do not find releated documentation explain it.

    capabilities.setCapability(MobileCapabilityType.APP, "settings");
    final IOSDriver driver = new IOSDriver(new URL("http://10.182.62.110:4826/wd/hub"),capabilities);
    driver.installApp("live.ipa");
    Map<String, Object> args = new HashMap<>();
    byte[] byteContent = Files.readAllBytes(new File("~/Certificates.pem").toPath());
    IOSDriver wd = (IOSDriver) getWebDriver().getDriver();
    args.put("content", Base64.getEncoder().encodeToString(byteContent));
    wd.executeScript("mobile: installCertificate", args);

@lzus have you fixed this issue, can you help me with this how to fix.

May be fixed but i am not sure because i left the firm and did not trace this issue later.
That time i got an idea: workaround it by kill the hangup process and reopen it again, but not try much.
i remember later i added one Capability but not remember if it valid:
capabilities.setCapability(“useNewWDA”, “true”);

so were you able to ever access and install that certificate using executeScript, even if you weren’t able to trust that root CA