When I attempt to connect to my PocketMine Server (running on Ubuntu 18.04), my Minecraft bedrock client fails to connect, with the error message Could not connect: Outdated server!, the PocketMine console says; [13:26:42] [RakLibServer thread/NOTICE]: Refused connection from IP Address 61390 due to incompatible RakNet protocol version (expected 9, got 10) I have already downloaded the new PocketMine-MP.phar file from github, and the new start.sh, what am I missing here?
You are missing the fact that you need to wait patiently, it usually takes weeks for pocketmine to be updated to the latest mc version. If you cannot wait i suggest to use the official bedrock server.