Issues with Include

I have included "aes.h" into another header file. I have gotten the following errors. I believe that "aes.h" is in my path, but is that the only reason why these errors would be happening, or is there something else that I am missing? I have put "aes.h" in the same place as my header file that I am working on, but these errors happened still

error: ‘AES_init_ctx’ was not declared in this scope
13 | AES_init_ctx(&ctx, key);

error: ‘void AES_init_ctx(rv32_custom_add(processor_t*, insn_t, reg_t)::AES_ctx*, const uint8_t*)’, declared using local type ‘rv32_custom_add(processor_t*, insn_t, reg_t)::AES_ctx’, is used but never defined [-fpermissive]
52 | void AES_init_ctx(struct AES_ctx* ctx, const uint8_t* key);

Start by reading aes.h alongside the other header that includes it, then trace the declarations and definitions referenced by AES_init_ctx. Reproduce the reported compiler errors and determine why the declaration is unavailable or defined against the local AES_ctx type; done means the include and type usage are understood and the errors no longer occur.

Written by the indexing model from the issue text.