TypeError: Cannot set property 'target' of null
    at Tools.Battle.runEvent (C:\GitHub\Pokemon-Showdown\battle-engine.js:1896:28)
    at Tools.Battle.getDamage (C:\GitHub\Pokemon-Showdown\battle-engine.js:2666:20)
    at Tools.exports.BattleScripts.moveHit (C:\GitHub\Pokemon-Showdown\data\scripts.js:345:18)
    at Tools.exports.BattleScripts.tryMoveHit (C:\GitHub\Pokemon-Showdown\data\scripts.js:264:18)
    at Tools.exports.BattleScripts.useMove (C:\GitHub\Pokemon-Showdown\data\scripts.js:157:18)
    at Tools.exports.BattleScripts.runMove (C:\GitHub\Pokemon-Showdown\data\scripts.js:45:8)
    at Tools.Battle.runDecision (C:\GitHub\Pokemon-Showdown\battle-engine.js:3040:9)
    at Tools.Battle.go (C:\GitHub\Pokemon-Showdown\battle-engine.js:3202:9)
    at Tools.Battle.commitDecisions (C:\GitHub\Pokemon-Showdown\battle-engine.js:3280:8)
    at Tools.Battle.choose (C:\GitHub\Pokemon-Showdown\battle-engine.js:3262:9)

Additional information:
message = battle-randombattle-31|choose|p2|move Facade|3
currentRequest = move

Log:
|player|p1|494|266
|player|p2|V4|94
|gametype|singles
|tier|Random Battle
|rule|Sleep Clause Mod: Limit one foe put to sleep
|rule|HP Percentage Mod: HP is reported as percentages
|
|start
|split
|switch|p1a: Electrode|Electrode, L86|243/243
|switch|p1a: Electrode|Electrode, L86|243/243
|switch|p1a: Electrode|Electrode, L86|243/243
|switch|p1a: Electrode|Electrode, L86|243/243
|split
|switch|p2a: Lairon|Lairon, L86, M|243/243
|switch|p2a: Lairon|Lairon, L86, M|243/243
|switch|p2a: Lairon|Lairon, L86, M|243/243
|switch|p2a: Lairon|Lairon, L86, M|243/243
|turn|1
|callback|decision
|
|move|p1a: Electrode|Foul Play|p2a: Lairon
|debug|randBW(100) = 70
|debug|randBW(16) = 15
|debug|randBW(16) = 7
|-resisted|p2a: Lairon
|split
|-damage|p2a: Lairon|220/243
|-damage|p2a: Lairon|220/243
|-damage|p2a: Lairon|220/243
|-damage|p2a: Lairon|220/243
|move|p2a: Lairon|Head Smash|p1a: Electrode
|debug|randBW(100) = 34
|debug|randBW(16) = 1
|debug|ModifyAtk modifier: 0x1800
|debug|randBW(16) = 7
|-enditem|p1a: Electrode|Focus Sash
|split
|-damage|p1a: Electrode|1/243
|-damage|p1a: Electrode|1/243
|-damage|p1a: Electrode|1/243
|-damage|p1a: Electrode|1/243
|
|turn|2
|callback|decision
|
|split
|switch|p2a: Teddiursa|Teddiursa, L95, F|268/268
|switch|p2a: Teddiursa|Teddiursa, L95, F|268/268
|switch|p2a: Teddiursa|Teddiursa, L95, F|268/268
|switch|p2a: Teddiursa|Teddiursa, L95, F|268/268
|move|p1a: Electrode|Thunderbolt|p2a: Teddiursa
|debug|randBW(100) = 58
|debug|randBW(16) = 15
|debug|randBW(16) = 13
|split
|-damage|p2a: Teddiursa|156/268
|-damage|p2a: Teddiursa|156/268
|-damage|p2a: Teddiursa|156/268
|-damage|p2a: Teddiursa|156/268
|debug|randBW(100) = 87
|
|-activate|p2a: Teddiursa|item: Toxic Orb
|-status|p2a: Teddiursa|tox
|turn|3
|callback|decision
|
|move|p1a: Electrode|Taunt|p2a: Teddiursa
|debug|randBW(100) = 22
|-start|p2a: Teddiursa|move: Taunt
|move|p2a: Teddiursa|Facade|p1a: Electrode
|debug|randBW(100) = 2
|debug|randBW(16) = 4