The vertical component of acceleration must be negative.

With that initial velocity, the projectile will never reach the selected vertical displacement.

If the orientation is 0° (or negative), and the vertical displacement is equal to zero, there is no trajectory.

If the initial velocity and the vertical displacement are both equal to zero, there is no trajectory.

It is impossible to add more trajectories.  Delete some trajectories or select Auto Delete from the Trajectories menu.

The format of the acceleration is incorrect.

The format of the vertical displacement is incorrect.

The format of the orientation is incorrect.

The magnitude of the initial velocity must be positive.

The format of the initial velocity is incorrect.

The orientation must be between -90° et +90°.