Compile Error: Invalid outside procedure - Workbook Attached

Hello Excellers,

Long time listener, first time caller.

I'm stuck completely some VBA. Keep getting the "Compile Error: Invalid outside procedure" message. Which I believe means there's a random bit of floating instruction, but for the life of me I can't see the wood through the trees.

I have attached a copy of the workbook. Could anyone kindly take a look at let me know how to fix.

P.S I'm sure theres also a simpler way or writing the VBA, but I'm this deep in at this point, so just looking for the fix please.

Ahhh. What a rookie error.
Quite likely! I thought I was going mad. Thanks Romper.