iOS Tests with Appium > 1.13.0 failing with "missing bundleId"

If I run Tests on iOS devices on AWS Device Farm with Appium node.js (webdriverio) I always get the following error message if using appium versions higher than 1.13.0:

“Original error: ‘bundleId’ desired capability not provided Make sure you follow the tutorial at Try to remove the WebDriverAgentRunner application from the device if it is installed and reboot the device.”

I followed the provided guidline in the link. One time only with the xcodeOrgId & xcodeSigningId capabilities for appium and one time with the additional bundleId (of the App) capability (In my wdio.conf.js). The tests still fail with the same issue / error message. Can you further help me on this issue?