Resolved NavMeshAgent.CalculatePath gives null reference exception

I have this error when I'm running my script:
NullReferenceException: Object reference not set to an instance of an object
UnityEngine.AI.NavMeshAgent.CalculatePath (UnityEngine.Vector3 targetPosition, UnityEngine.AI.NavMeshPath path) (at < c7d8111c68e74de4b24f0d8ed8598f1b >:0)

I've tried asking on unit answers, noone responded (https://answers.unity.com/questions/1770312/navmeshagentcalculatepath-keeps-getting-null-refer.html).

I've used the code provided by the user Shudrikn from the link below to calculate NavMeshPath cost https://forum.unity.com/threads/cos...95.306305390.1599944264-1849265996.1585780230 . But I changed methods from being static to normal cause I have multiple objects that uses this function separatly.

I found this on unity answers, but it doesn't seem to help cause its about js and I'm using c#: https://answers.unity.com/questions/301736/navmeshagentcalculatepath-keep-getting-nullreferen.html

Pls, help, this is essential for my project and I don't know what to do.

 

If you comment out the CalculatePathCost() line, does the null reference error still occur?

Also maybe CalculatePath() does something to the path which makes it impossible to re-use.

 

it still occurs if I comment out that function + I used this function before and it worked (but not as intended) I think it all started with me adding dictionary.

 

What happens if you instantiate a new NavMeshPath inside the foreach instead of outside?

 

still same, it returns error even if I call agent.CalculatePath() outside this function (in the start method for example)

 

ok, actually I'm stupid. I had another navmeshpath variable that I didn't instantiate so it returned the error when I tried to assign a valu to it. It's strange that unity don't mention the name of the variable that is "empty".