Hello,
i try to install iode on my Samsung Galaxy S9+ but i always get an “Singature verification Error” at 47% end then the transfer stops. Any help for me?
You probably use an incompatible recovery. You must install iodéOS recovery.
I could solve this problem. After resetting My S9+ to the factory settings with the vendor OS, I could install idea with no further issues. Took me hours to figure this out 
Ok. An early information that may save you some time again: the upcoming iodéOS 3.0 builds for samsung 9 series will need to format data, the encryption method in iodé 2.x being no longer supported.