try fix

src/crosschain.cpp

@@ -284,7 +284,7 @@ bool CheckMoMoM(uint256 kmdNotarisationHash, uint256 momom)
         return nota.second.MoMoM == momom;
     };
 
-    return (bool) ScanNotarisationsFromHeight(block.nHeight-100, checkMoMoM, nota);
+    return (bool) ScanNotarisationsFromHeight(block.GetHeight()-100, checkMoMoM, nota);
 
 }
 

src/crosschain_authority.cpp

@@ -33,7 +33,7 @@ bool CheckTxAuthority(const CTransaction &tx, CrosschainAuthority auth)
         if (tx.vout.size() < txIn.prevout.n) return false;
         CScript spk = tx.vout[txIn.prevout.n].scriptPubKey;
         if (spk.size() != 35) return false;
-        const unsigned char *pk = spk.data();
+        const unsigned char *pk = spk[0];
         if (pk++[0] != 33) return false;
         if (pk[33] != OP_CHECKSIG) return false;