Shader Parse error

I've never looked into shading much, and I really only need it for one aspect of my project: a projector.

I'm following along with a guide and copied the code into VS, but it produced an error:

     Shader error in 'Projector/AdditiveTint': Parse error: syntax error at line 13    Solution 'Battle Sandbox2' ‎(1 project)        0
 

The 0 at the end is a little disconcerting as that's supposedly the line number for the error, so a bit of a discrepancy there...

Here's the code in question:

 Shader "Projector/AdditiveTint" {
     Properties{
         _Color("Tint Color", Color) = (1,1,1,1)
         _Attenuation("Falloff", Range(0.0, 1.0)) = 1.0
         _ShadowTex("Cookie", 2D) = "gray" {}
     }
         Subshader{
         Tags{ "Queue" = "Transparent" }
         Pass{
         ZWrite Off
         ColorMask RGB
         Blend SrcAlpha One // Additive blending
         Offset - 1, -1
         
         CGPROGRAM
 #pragma vertex vert
 #pragma fragment frag
 #include "UnityCG.cginc"
 
     struct v2f {
         float4 uvShadow : TEXCOORD0;
         float4 pos : SV_POSITION;
     };
 
     float4x4 unity_Projector;
     float4x4 unity_ProjectorClip;
 
     v2f vert(float4 vertex : POSITION)
     {
         v2f o;
         o.pos = mul(UNITY_MATRIX_MVP, vertex);
         o.uvShadow = mul(unity_Projector, vertex);
         return o;
     }
 
     sampler2D _ShadowTex;
     fixed4 _Color;
     float _Attenuation;
 
     fixed4 frag(v2f i) : SV_Target
     {
         // Apply alpha mask
         fixed4 texCookie = tex2Dproj(_ShadowTex, UNITY_PROJ_COORD(i.uvShadow));
     fixed4 outColor = _Color * texCookie.a;
     // Attenuation
     float depth = i.uvShadow.z; // [-1 (near), 1 (far)]
     return outColor * clamp(1.0 - abs(depth) + _Attenuation, 0.0, 1.0);
     }
         ENDCG
     }
     }
 }

Like I said, I don't work with shaders and I really only understand the general concept. Since the cause of the error appears to vary somewhat, I'm at a loss. The most I could do was check to see if there were an even number of braces, which there were.

Thanks.