Some Console Errors .. What are mean ?

… Here are console errors followed with error line place …
Error 1 |

Assets/Circuspheres/Player1/Scripts/Player1_SphereRoll_Check.cs(22,9):error CS0103: The name `b1Script' does not exist in the current context
private Player1_SphereRoll_Check b1Script;

Error 2 |

Assets/Circuspheres/Player1/Scripts/Player1_SphereRoll.js(3,9): BCE0043: Unexpected token: Player1_SphereRoll_Check.
private Player1_SphereRoll_Check b1Script;

Another question, please:
The following line I convert it from C# to Javascript, Has any errors ?
C#:

public bool IsStill { get { return mBody.velocity.sqrMagnitude <= mStillMarginal; } }

JS:

if (mBody.velocity.sqrMagnitude <= mStillMarginal)
{
IsStill = true;
}

It is difficult to help you with your errors with the limited code you have provided. You should probably post the contents of Player1_SphereRoll_Check.cs and Player1_SphereRoll.js if you want more than random guesses.

Random guess for error 1:
You’re using b1Script in a static method or property.

Random guess for error 2:
There are some rules when combining JS and C# code, my guess is that the JS code is not 2nd pass compiled after the C# code. You should try to stay with one language to avoid such errors.

Assets/Circuspheres/Player1/Scripts/Player1_SphereRoll**.js**(3,9): BCE0043: Unexpected token: Player1_SphereRoll_Check.

You’re using C# syntax in a JS file.