Entering Penalties into WER
                
                    
                    
                    Here's how I work around that issue (from memory; can't recreate it w/o an active event, apparently).
First, click past the error dialog; then, it seems to default to All players - change that by clicking the Active players only radio button.  (I may have that backwards… I just know I have to select whichever one it doesn't default to…)
Note, however, that you need to enter penalties for a player while they're still active.  I find that it's best to enter all the penalties before the end of the current round - then, if the player marked drop on the result slip, and I've already dropped them, I can go to the Players tab, re-enroll them, enter their penalty, then re-drop them.  I do not advise attempting that in the next round…  :p
Thanks, and hope this helps! - Scott Marshall, L5 & occasional TO/SK, Denver