I am using a huawei P9 EVA-L19.
After completing all of the steps such as installing I had no problem until I tried booting it:
C:\platform-tools>fastboot boot twrp-3.1.1-0-eva.img
Sending 'boot.img' (22432 KB) OKAY [ 0.479s]
Booting FAILED (remote: 'Command not allowed')
fastboot: error: Command failed
adb server version (39) doesn't match this client (41); killing...
* daemon started successfully