Lightroom does support the raw data from Sony A7 II (ILCE-A7M2), infact you only need Lightroom 5.7.1 to use the raw images.
Have you copied the files from SD card to the system or used any file transfer utility.
Thanks Mohit for your answer. I have copied the files from SD card over the import dialog into LR 6.3. I have downloaded the A7II firmwareupdate 2.0 from Sony. There it is now possible to create uncompressed RAW files. The compressed files from the A7II are running without any problems on LR 6.3.
Great..Thanks for sharing the solution.