Ok Solidity geniuses, explain what this error message means and how to fix it. No googling/chatgpting. :)

```
$ solc --combined-json bin,abi Test.sol

Unimplemented feature:
```

more in thread...

Co-founder of Curvegrid. Our MultiBaas blockchain development platform makes it fast, easy, and cost effective to build blockchain apps.

Dynamic exception type: boost::wrapexcept<solidity::langutil::UnimplementedFeatureError>
std::exception::what: Copying of type struct Test.SimpleStruct memory[] memory to storage not yet supported.
[solidity::util::tag_comment*] = Copying of type struct Test.SimpleStruct memory[] memory to storage not yet supported.

/solidity/libsolidity/codegen/ArrayUtils.cpp(228): Throw in function auto solidity::frontend::ArrayUtils::copyArrayToStorage(const solidity::frontend::ArrayType &, const solidity::frontend::ArrayType &)::(anonymous class)::operator()(solidity::frontend::CompilerContext &) const