diff --git a/src/frontend/src/icp/utils/icp-transactions.utils.ts b/src/frontend/src/icp/utils/icp-transactions.utils.ts
index bef32fe2e5..63dad2bf1d 100644
--- a/src/frontend/src/icp/utils/icp-transactions.utils.ts
+++ b/src/frontend/src/icp/utils/icp-transactions.utils.ts
@@ -7,7 +7,7 @@ import type {
 import { getAccountIdentifier } from '$icp/utils/icp-account.utils';
 import type { OptionIdentity } from '$lib/types/identity';
 import type { Tokens, Transaction, TransactionWithId } from '@dfinity/ledger-icp';
-import { fromNullable, nonNullish } from '@dfinity/utils';
+import { fromNullable, jsonReplacer, nonNullish } from '@dfinity/utils';
 
 export const mapTransactionIcpToSelf = (
 	tx: TransactionWithId
@@ -137,5 +137,5 @@ export const mapIcpTransaction = ({
 		};
 	}
 
-	throw new Error(`Unknown transaction type ${JSON.stringify(transaction)}`);
+	throw new Error(`Unknown transaction type ${JSON.stringify(transaction, jsonReplacer)}`);
 };
diff --git a/src/frontend/src/icp/utils/icrc-transactions.utils.ts b/src/frontend/src/icp/utils/icrc-transactions.utils.ts
index bd5fe1885d..2c784785af 100644
--- a/src/frontend/src/icp/utils/icrc-transactions.utils.ts
+++ b/src/frontend/src/icp/utils/icrc-transactions.utils.ts
@@ -6,7 +6,7 @@ import type {
 import { getIcrcAccount } from '$icp/utils/icrc-account.utils';
 import type { OptionIdentity } from '$lib/types/identity';
 import { encodeIcrcAccount, type IcrcTransactionWithId } from '@dfinity/ledger-icrc';
-import { fromNullable, isNullish, nonNullish } from '@dfinity/utils';
+import { fromNullable, isNullish, jsonReplacer, nonNullish } from '@dfinity/utils';
 
 export const mapTransactionIcrcToSelf = (tx: IcrcTransactionWithId): IcrcTransaction[] => {
 	const { transaction, id } = tx;
@@ -70,7 +70,7 @@ export const mapIcrcTransaction = ({
 		fromNullable(approve) ?? fromNullable(burn) ?? fromNullable(mint) ?? fromNullable(transfer);
 
 	if (isNullish(data)) {
-		throw new Error(`Unknown transaction type ${JSON.stringify(transaction)}`);
+		throw new Error(`Unknown transaction type ${JSON.stringify(transaction, jsonReplacer)}`);
 	}
 
 	const accountIdentifier = nonNullish(identity)
diff --git a/src/frontend/src/lib/canisters/signer.errors.ts b/src/frontend/src/lib/canisters/signer.errors.ts
index 18e85725dc..912043330b 100644
--- a/src/frontend/src/lib/canisters/signer.errors.ts
+++ b/src/frontend/src/lib/canisters/signer.errors.ts
@@ -5,17 +5,18 @@ import type {
 	SendBtcError as SignerCanisterSendBtcError
 } from '$declarations/signer/signer.did';
 import { CanisterInternalError } from '$lib/canisters/errors';
+import { jsonReplacer } from '@dfinity/utils';
 
 export class SignerCanisterPaymentError extends CanisterInternalError {
 	constructor(err: PaymentError) {
 		if ('UnsupportedPaymentType' in err) {
 			super('Unsupported payment type');
 		} else if ('LedgerWithdrawFromError' in err) {
-			super(`Ledger error: ${JSON.stringify(err.LedgerWithdrawFromError.error)}`);
+			super(`Ledger error: ${JSON.stringify(err.LedgerWithdrawFromError.error, jsonReplacer)}`);
 		} else if ('LedgerUnreachable' in err) {
-			super(`Ledger unreachable: ${JSON.stringify(err.LedgerUnreachable)}`);
+			super(`Ledger unreachable: ${JSON.stringify(err.LedgerUnreachable, jsonReplacer)}`);
 		} else if ('LedgerTransferFromError' in err) {
-			super(`Ledger error: ${JSON.stringify(err.LedgerTransferFromError)}`);
+			super(`Ledger error: ${JSON.stringify(err.LedgerTransferFromError, jsonReplacer)}`);
 		} else if ('InsufficientFunds' in err) {
 			super(
 				`Insufficient funds needed ${err.InsufficientFunds.needed} but available ${err.InsufficientFunds.available}`
@@ -46,7 +47,7 @@ export const mapSignerCanisterSendBtcError = (
 		return new SignerCanisterPaymentError(err.PaymentError);
 	}
 	if ('BuildP2wpkhError' in err) {
-		return new CanisterInternalError(JSON.stringify(err.BuildP2wpkhError));
+		return new CanisterInternalError(JSON.stringify(err.BuildP2wpkhError, jsonReplacer));
 	}
 	return new CanisterInternalError('Unknown SignerCanisterSendBtcError');
 };
@@ -56,7 +57,9 @@ export const mapSignerCanisterGetEthAddressError = (
 ): CanisterInternalError => {
 	if ('SigningError' in err) {
 		const [code, addOns] = err.SigningError;
-		return new CanisterInternalError(`Signing error: ${JSON.stringify(code)} ${addOns}`);
+		return new CanisterInternalError(
+			`Signing error: ${JSON.stringify(code, jsonReplacer)} ${addOns}`
+		);
 	}
 
 	if ('PaymentError' in err) {