diff --git a/packages/cactus-core/package.json b/packages/cactus-core/package.json
index 1913d39c06..efce4f755a 100644
--- a/packages/cactus-core/package.json
+++ b/packages/cactus-core/package.json
@@ -56,7 +56,7 @@
     "express-jwt-authz": "2.4.1",
     "express-openapi-validator": "5.0.4",
     "http-errors": "2.0.0",
-    "http-errors-enhanced": "1.1.2",
+    "http-errors-enhanced-cjs": "2.0.1",
     "run-time-error-cjs": "1.4.0",
     "safe-stable-stringify": "2.4.3",
     "typescript-optional": "2.0.1"
diff --git a/packages/cactus-core/src/main/typescript/consensus-has-transaction-finality.ts b/packages/cactus-core/src/main/typescript/consensus-has-transaction-finality.ts
index f4e2765900..db8be75e16 100644
--- a/packages/cactus-core/src/main/typescript/consensus-has-transaction-finality.ts
+++ b/packages/cactus-core/src/main/typescript/consensus-has-transaction-finality.ts
@@ -4,9 +4,21 @@ import {
   ConsensusAlgorithmFamiliesWithOutTxFinality,
 } from "@hyperledger/cactus-core-api";
 
+import { BadRequestError } from "http-errors-enhanced-cjs";
+
 export function consensusHasTransactionFinality(
   consensusAlgorithmFamily: ConsensusAlgorithmFamily,
 ): boolean {
+  const woTxFinalityValues = Object.values(
+    ConsensusAlgorithmFamiliesWithOutTxFinality,
+  );
+  const withTxFinalityValues = Object.values(
+    ConsensusAlgorithmFamiliesWithTxFinality,
+  );
+
+  const acceptedValues = [...woTxFinalityValues, ...withTxFinalityValues];
+  const acceptedValuesCsv = acceptedValues.join(",");
+
   const isInConsensusAlgorithmFamiliesWithTxFinality = (
     Object.values(ConsensusAlgorithmFamiliesWithTxFinality) as string[]
   ).includes(consensusAlgorithmFamily.toString());
@@ -19,10 +31,13 @@ export function consensusHasTransactionFinality(
     !isInConsensusAlgorithmFamiliesWithTxFinality &&
     !isInConsensusAlgorithmFamiliesWithOutTxFinality;
 
-  if (unrecognizedConsensusAlgorithmFamily) {
-    throw new Error(
-      `Unrecognized consensus algorithm family: ${consensusAlgorithmFamily}`,
-    );
-  }
-  return isInConsensusAlgorithmFamiliesWithTxFinality;
+    if (unrecognizedConsensusAlgorithmFamily) {
+      throw new BadRequestError(
+        `Unrecognized consensus algorithm family: ${consensusAlgorithmFamily}`,
+        {
+          acceptedValuesCsv,
+        },
+      );
+    }
+    return isInConsensusAlgorithmFamiliesWithTxFinality;
 }
diff --git a/packages/cactus-core/src/main/typescript/web-services/get-open-api-spec-v1-endpoint-base.ts b/packages/cactus-core/src/main/typescript/web-services/get-open-api-spec-v1-endpoint-base.ts
index 42df17b5ac..0a699ca6df 100644
--- a/packages/cactus-core/src/main/typescript/web-services/get-open-api-spec-v1-endpoint-base.ts
+++ b/packages/cactus-core/src/main/typescript/web-services/get-open-api-spec-v1-endpoint-base.ts
@@ -1,6 +1,4 @@
 import type { Express, Request, Response } from "express";
-import { RuntimeError } from "run-time-error-cjs";
-import { stringify } from "safe-stable-stringify";
 
 import {
   Logger,
@@ -19,6 +17,7 @@ import {
 import { PluginRegistry } from "../plugin-registry";
 
 import { registerWebServiceEndpoint } from "./register-web-service-endpoint";
+import { handleRestEndpointException } from "./handle-rest-endpoint-exception";
 
 export interface IGetOpenApiSpecV1EndpointBaseOptions<S, P> {
   logLevel?: LogLevelDesc;
@@ -181,16 +180,8 @@ export class GetOpenApiSpecV1EndpointBase<S, P> implements IWebServiceEndpoint {
       res.status(200);
       res.json(oas);
     } catch (ex: unknown) {
-      const eMsg = `${fnTag} failed to serve request: ${reqMeta}`;
-      this.log.debug(eMsg, ex);
-
-      const cause = ex instanceof Error ? ex : stringify(ex);
-      const error = new RuntimeError(eMsg, cause);
-
-      res.status(500).json({
-        message: "Internal Server Error",
-        error,
-      });
+      const errorMsg = `${fnTag} request handler fn crashed for: ${reqMeta}`;
+      handleRestEndpointException({ errorMsg, log: this.log, error: ex, res });
     }
   }
 }
diff --git a/packages/cactus-core/src/main/typescript/web-services/handle-rest-endpoint-exception.ts b/packages/cactus-core/src/main/typescript/web-services/handle-rest-endpoint-exception.ts
index 56b02462bc..56ffb0dbc3 100644
--- a/packages/cactus-core/src/main/typescript/web-services/handle-rest-endpoint-exception.ts
+++ b/packages/cactus-core/src/main/typescript/web-services/handle-rest-endpoint-exception.ts
@@ -42,7 +42,7 @@ export async function handleRestEndpointException(
   const errorAsSanitizedJson = safeStringifyException(ctx.error);
 
   const { identifierByCodes, INTERNAL_SERVER_ERROR } = await import(
-    "http-errors-enhanced"
+    "http-errors-enhanced-cjs"
   );
 
   if (createHttpError.isHttpError(ctx.error)) {
diff --git a/packages/cactus-core/src/main/typescript/web-services/register-web-service-endpoint.ts b/packages/cactus-core/src/main/typescript/web-services/register-web-service-endpoint.ts
index 88b6745a4e..6771175400 100644
--- a/packages/cactus-core/src/main/typescript/web-services/register-web-service-endpoint.ts
+++ b/packages/cactus-core/src/main/typescript/web-services/register-web-service-endpoint.ts
@@ -3,6 +3,8 @@ import { Express } from "express";
 
 import { IWebServiceEndpoint } from "@hyperledger/cactus-core-api";
 
+import { createRuntimeErrorWithCause } from "@hyperledger/cactus-common";
+
 /**
  * Hooks up an endpoint instance to an ExpressJS web app object.
  *
@@ -40,10 +42,8 @@ export async function registerWebServiceEndpoint(
     } else {
       registrationMethod(httpPath, requestHandler);
     }
-  } catch (ex) {
-    throw new Error(
-      `${fnTag} Express verb method ${httpVerb} threw ` +
-        ` while registering endpoint: ${ex.message}`,
-    );
+  } catch (ex: unknown) {
+    const errorMessage = `${fnTag} Express verb method ${httpVerb} threw while registering endpoint on path ${httpPath}`;
+    throw createRuntimeErrorWithCause(errorMessage, ex);
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 333145d3fd..94ad34edbd 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7118,7 +7118,7 @@ __metadata:
     express-jwt-authz: 2.4.1
     express-openapi-validator: 5.0.4
     http-errors: 2.0.0
-    http-errors-enhanced: 1.1.2
+    http-errors-enhanced-cjs: 2.0.1
     node-mocks-http: 1.14.0
     run-time-error-cjs: 1.4.0
     safe-stable-stringify: 2.4.3
@@ -28885,10 +28885,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"http-errors-enhanced@npm:1.1.2":
-  version: 1.1.2
-  resolution: "http-errors-enhanced@npm:1.1.2"
-  checksum: 1bc38968cc4a0dcb6a2d25e557d0321f3fa17da2f1a6b898158fa3b9bb103fd5374b38e60d87926e5adf9310fd7b6136023754b0db1489a6e80d6d242375ba0f
+"http-errors-enhanced-cjs@npm:2.0.1":
+  version: 2.0.1
+  resolution: "http-errors-enhanced-cjs@npm:2.0.1"
+  checksum: b339f934c37c352a12ac3d2e0d5a07e74f1346322bafd11ea9ff21805c62208815f258ce92dc85d8ebb151339e7fcd006dbfbc98af07eca76acae7310c92cfd2
   languageName: node
   linkType: hard