iOS Question B4i app won't install on bridged device

I am a long time happy user of B4A and just purchased the bundle now with the hosted builder to create my first B4i app. Followed all procedure explained on the community to get my apple id etc... but when I try to install the default app (when first opening B4i) to my device (iPod Touch) via the B4i bridge it seems that the app is installing (icon appears on device) but after a few seconds the device says that the app cannot be downloaded and says done/try again. Search the forum but did not find a solution.

I use B4i v4.81, the newest Bridge app, and an iPod Touch v9.3.5 connected via usb.
Compile via the hosted builder.
If you require more info or settings, please let me know ;-)