Commands and Block Names

I dont know why the command doesn't work, the output mussage is: cannot execute particle as (player name) : r/MinecraftCommands

Any idea why my command won't work? It doesn't work once I give the NPC a name, ideas for a fix? : r/MinecraftCommands

BLOCKIFY command - BricsCAD

Detecting an custom named item in mc 1.13.x - Commands, Command Blocks and Functions - Redstone Discussion and Mechanisms - Minecraft: Java Edition - Minecraft Forum - Minecraft Forum

How in what order do you need to type to make the command block say a players name in a specific color? - Commands, Command Blocks and Functions - Redstone Discussion and

TIL renaming a command block in an anvil changes the name in chat! : r/Minecraft

Server Exploit SpigotMC - High Performance Minecraft

Replacing blocks

How to paste commands in command blocks