Compilation error (ClientCreditsList.cpp:315:10: error: ‘CryptoPP::RSASSA_PKCS1v15_SHA_Verifier’).

[Achaean]

On a Debian stable based distribution:
(libcrypto++8 v.8.4.0-1).

>make
Generating translations for ar
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Compiling FileFunctions.cpp
Compiling Format.cpp
Compiling MD5Sum.cpp
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Compiling Path.cpp
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Compiling StringFunctions.cpp
Compiling TextFile.cpp
Building libmulecommon.a
ar: `u' modifier ignored since `D' is the default (see `U')
Parsing 2 files
FileName: ECTagTypes
FileContent: EC tag types for use on the ec library.
Reading content section...
	Datatype: Enum
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	DataType: uint8
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FileName: ECCodes
FileContent: EC codes and type definition.
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	DataType: uint32
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All info parsed
Generating ECVersion.h... unchanged.
Compiling ECTag.cpp
Compiling ECPacket.cpp
Compiling ECSocket.cpp
Compiling RemoteConnect.cpp
Compiling ECSpecialTags.cpp
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Building libec.a
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Compiling onlinesig.cpp
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Compiling wxcasprint.cpp
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Compiling LibSocket.cpp
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Compiling DeadSourceList.cpp
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Compiling StateMachine.cpp
Compiling TerminationProcessAmuleweb.cpp
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Building libmuleappcore.a
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Compiling BarShader.cpp
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Compiling EditServerListDlg.cpp
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Compiling FileDetailListCtrl.cpp
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Compiling MuleColour.cpp
Compiling MuleGifCtrl.cpp
Compiling MuleListCtrl.cpp
Compiling MuleNotebook.cpp
Compiling MuleTextCtrl.cpp
Compiling MuleCollection.cpp
Compiling muuli_wdr.cpp
Building libmuleappgui.a
ar: `u' modifier ignored since `D' is the default (see `U')
Compiling CFile.cpp
Compiling ClientCredits.cpp
Compiling DataToText.cpp
Compiling ED2KLink.cpp
Compiling Friend.cpp
Compiling GapList.cpp
Compiling MagnetURI.cpp
Compiling MemFile.cpp
Compiling NetworkFunctions.cpp
Compiling OtherFunctions.cpp
Compiling Packet.cpp
Compiling RLE.cpp
Compiling SafeFile.cpp
Compiling SHA.cpp
Compiling Tag.cpp
Compiling TerminationProcess.cpp
Compiling Timer.cpp
Compiling UInt128.cpp
Building libmuleappcommon.a
ar: `u' modifier ignored since `D' is the default (see `U')
Compiling CaptchaDialog.cpp
Compiling CaptchaGenerator.cpp
Compiling PartFileConvert.cpp
Compiling PartFileConvertDlg.cpp
Compiling amule.cpp
Compiling BaseClient.cpp
Compiling ClientList.cpp
Compiling ClientCreditsList.cpp
ClientCreditsList.cpp: In member function ‘void CClientCreditsList::InitalizeCrypting()’:
ClientCreditsList.cpp:315:10: error: ‘CryptoPP::RSASSA_PKCS1v15_SHA_Verifier’ {aka ‘class CryptoPP::PK_FinalTemplate<CryptoPP::TF_VerifierImpl<CryptoPP::TF_SignatureSchemeOptions<CryptoPP::TF_SS<CryptoPP::RSA, CryptoPP::PKCS1v15, CryptoPP::SHA1, int>, CryptoPP::RSA, CryptoPP::PKCS1v15_SignatureMessageEncodingMethod, CryptoPP::SHA1> > >’} has no member named ‘DEREncode’
  315 |   pubkey.DEREncode(asink);
      |          ^~~~~~~~~
make[3]: *** [Makefile:1763: amule-ClientCreditsList.o] Error 1
make[2]: *** [Makefile:3258: all-recursive] Error 1
make[1]: *** [Makefile:490: all-recursive] Error 1
make: *** [Makefile:397: all] Error 2
>