NULL pointer to instance / ActionTargetsCursor

7GB crash file. Error:

NULL pointer to instance
Class: 'ActionTargetsCursor'
Function: 'SetMultipleItemAction'
Stack trace:
scripts/5_Mission/gui\actiontargetscursor.c:1208
scripts/5_Mission/gui\actiontargetscursor.c:197
scripts/5_Mission/gui\actiontargetscursor.c:207
scripts/5_Mission/gui\actiontargetscursor.c:349
ZenSleep/scripts/5_mission/gui\widgetoverrides.c:20
scripts/5_Mission/gui\actiontargetscursor.c:262