Weird audio problem

What the hell?? So first off I want to say that there is probably nothing wrong with the code. Today I was working on my project. I was trying to add sound effects to my other objects.. And I did. And then suddenly 2 errors popped up. On both of these errors I was basically trying to play Audio through script.

'AudioSource' does not contain a definition for 'clip' and no extension method 'clip' accepting a first argument of type 'AudioSource' could be found (are you missing a using directive or an assembly reference?

'AudioSource' does not contain a definition for 'Play' and no extension method 'Play' accepting a first argument of type 'AudioSource' could be found (are you missing a using directive or an assembly reference?)

Here is my code but again, there is 100% nothing wrong with it since it worked fine before. Also its not completely the same as I changed it a bit after trying to solve the problem. But either way the script is probably alright.

 public void ChangeLevel()
     {
         StartCoroutine(delayedLoad());
     }
 
     private IEnumerator delayedLoad()
     {
         AudioSource audio = GetComponent<AudioSource>();
         audio.clip = OtherClip;
         audio.Play();
         Player.SetActive(false);
         FadeOutPanel.SetActive(true);
         FadeOutAnim.enabled = true;
         yield return new WaitForSecondsRealtime(0.45f);
 
         SceneManager.LoadScene(0);
     }

So does anyone have any idea how could these errors just pop up after adding couple AudioSource components to gameobjects?

Thanks.

UPDATE!!

If I try...

  AudioSource audio = GetComponent<AudioSource>();
         if(audio == null)
         {
             print("AUDIO NOT RECOGNIZED");
         }
         else if(audio != null)
         {
             print("AUDIO RECOGNIZED");
         }

it prints message AUDIO NOT RECOGNIZED, that means that even though Audio source component is attached it doesnt recognize it.