Block insert LISP

[Ivan N]

Hello,
With the help of AI I am trying to make a .lsp script that insert specific block on every vertex of a polyline and orient two "arrows" to the previous and next vertex.
I try with different AI models and always I end up with error in Autocad (I use Autocad 2022) Error: "ActiveX Server returned the error: unknown name: "DYNAMICBLOCKPROPERTIES".
AI say that the block is not really a dynamic block, which I dont get, how block can be not really dynamic.

I am attaching both block and .lsp script. I hope someone will give me some advice what is wrong with the block or with .lsp script.
 

BlockInsert.lsp block.dwg