Why does line $72$ throw the following error and how do I fix it$?$std::'string encrypted;std::cout $$ "Encrypted: $"$ std::endl;$//$ Decrypt messageDecrypt$($privKey$,$ encrypted, decrypted$)$;return $0$;

$\}$inline CryptoPP::HexEncoder::HexEncoder$($CryptoPP:::BufferedTransformation $*$attachment $=($CryptoPP::BufferedTransformation

$*)$nullptr$,$ bool uppercase $=$ true, int groupSize $=0,$ const std$.$:$.$string &separator $="$:$",$ const std:$.$:string &

terminator $="")$

Construct a HexEncoder

Parameters: $$

attachment a BufferedTrasformation to attach to this object

uppercase a flag indicating uppercase output

groupSize the size of the output grouping

separator the separator to use between groups

terminator the terminator append after processing

$+1$ overload

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no instance of constructor "CryptoPP:.:StringSinkTemplate :StringSinkTemplate $[$with $T=$ std::string$]"$ matches the argument list

argument types are: $($std::ostream$)$