After playing long time regular (not AI) game, the algorithm starts to move my soldiers

[Krzysztof Morcinek]

 this.createBattleProvinces(this.provinceOwnership.getNeutralProvinces(), ProvinceOwner.Neutral);

const sourceProvince = this.getProvinceByName(provinceName); // null returned

// and later
const battleProvince = new BattleProvince(sourceProvince, provinceOwner);
throw new Error(`province is null`);  
     

[Krzysztof Morcinek]

Maybe neutral was throwing so far, and when the game is late, ->
there are no more Neutral provinces ->
there is no error thrown ->
algorithm continue to calculate and it also freezes.

[Krzysztof Morcinek]

The fog of war is the clue here.

• When I start a new game and all is visible (for of war to false) then throw new Error(province is null); does NOT appear
• When I start a new game and some provinces are NOT visible (for of war to true) then the error appears.

[Krzysztof Morcinek]

The probable solution is to switch OFF the "Run AI" checkbox and AI will not be running.

Maybe have it ON only on "testing" script?