Running into same issue. I'm using a simple setup to test if a player is on a team. I initially run command </scoreboard teams add a [Fighter]>, then </scoreboard teams join a [@p]>. But when I run </testfor @p[team=a]> I get the error message "The entity UUID provided is in an invalid format". I've tried to find some syntax error, but none exists. (Am working in 1.8.4}
Henry Nelson Aoki
Running into same issue. I'm using a simple setup to test if a player is on a team. I initially run command </scoreboard teams add a [Fighter]>, then </scoreboard teams join a [@p]>. But when I run </testfor @p[team=a]> I get the error message "The entity UUID provided is in an invalid format". I've tried to find some syntax error, but none exists. (Am working in 1.8.4}