error on PBEM replay

[Partizanka]

I am getting an error that is new to me in a new PBEM battle of RBR v. 4.01. After typing in my password and asking  to watch the battle replay, I get a small notification window that is labelled "report." In that window there is a hashtag symbol and an at symbol  #@  Underneath the window are the clickable options Okay and Cancel. After hitting cancel, I get a message window saying there was an error with the replay file. Anyone seen anything similar or have advice how to correct this? After closing the error message, I seem to be able to play the turn fine.