diff --git a/lib/start-proxy.js b/lib/start-proxy.js
index c68153d33d..9bbcaeba9c 100644
--- a/lib/start-proxy.js
+++ b/lib/start-proxy.js
@@ -2,6 +2,7 @@
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.getCredentials = getCredentials;
 const languages_1 = require("./languages");
+const util_1 = require("./util");
 const LANGUAGE_TO_REGISTRY_TYPE = {
     java: "maven_repository",
     csharp: "nuget_feed",
@@ -44,13 +45,13 @@ function getCredentials(logger, registrySecrets, registriesCredentials, language
     catch {
         // Don't log the error since it might contain sensitive information.
         logger.error("Failed to parse the credentials data.");
-        throw new Error("Invalid credentials format.");
+        throw new util_1.ConfigurationError("Invalid credentials format.");
     }
     const out = [];
     for (const e of parsed) {
         if (e.url === undefined && e.host === undefined) {
             // The proxy needs one of these to work. If both are defined, the url has the precedence.
-            throw new Error("Invalid credentials - must specify host or url");
+            throw new util_1.ConfigurationError("Invalid credentials - must specify host or url");
         }
         // Filter credentials based on language if specified. `type` is the registry type.
         // E.g., "maven_feed" for Java/Kotlin, "nuget_repository" for C#.
@@ -66,7 +67,7 @@ function getCredentials(logger, registrySecrets, registriesCredentials, language
             !isPrintable(e.username) ||
             !isPrintable(e.password) ||
             !isPrintable(e.token)) {
-            throw new Error("Invalid credentials - fields must contain only printable characters");
+            throw new util_1.ConfigurationError("Invalid credentials - fields must contain only printable characters");
         }
         out.push({
             type: e.type,
diff --git a/lib/start-proxy.js.map b/lib/start-proxy.js.map
index c50f53d9be..031deff1ab 100644
--- a/lib/start-proxy.js.map
+++ b/lib/start-proxy.js.map
@@ -1 +1 @@
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\ No newline at end of file
+{"version":3,"file":"start-proxy.js","sourceRoot":"","sources":["../src/start-proxy.ts"],"names":[],"mappings":";;AA8BA,wCA2EC;AAzGD,2CAAsD;AAEtD,iCAA4C;AAW5C,MAAM,yBAAyB,GAA6B;IAC1D,IAAI,EAAE,kBAAkB;IACxB,MAAM,EAAE,YAAY;IACpB,UAAU,EAAE,cAAc;IAC1B,MAAM,EAAE,cAAc;IACtB,IAAI,EAAE,iBAAiB;IACvB,IAAI,EAAE,gBAAgB;IACtB,oFAAoF;IACpF,OAAO,EAAE,EAAE;IACX,GAAG,EAAE,EAAE;IACP,EAAE,EAAE,EAAE;IACN,KAAK,EAAE,EAAE;CACD,CAAC;AAEX,kEAAkE;AAClE,+DAA+D;AAC/D,gDAAgD;AAChD,SAAgB,cAAc,CAC5B,MAAc,EACd,eAAmC,EACnC,qBAAyC,EACzC,cAAkC;IAElC,MAAM,QAAQ,GAAG,cAAc,CAAC,CAAC,CAAC,IAAA,yBAAa,EAAC,cAAc,CAAC,CAAC,CAAC,CAAC,SAAS,CAAC;IAC5E,MAAM,uBAAuB,GAAG,QAAQ;QACtC,CAAC,CAAC,yBAAyB,CAAC,QAAQ,CAAC;QACrC,CAAC,CAAC,SAAS,CAAC;IAEd,IAAI,cAAsB,CAAC;IAC3B,IAAI,qBAAqB,KAAK,SAAS,EAAE,CAAC;QACxC,MAAM,CAAC,IAAI,CAAC,qCAAqC,CAAC,CAAC;QACnD,cAAc,GAAG,MAAM,CAAC,IAAI,CAAC,qBAAqB,EAAE,QAAQ,CAAC,CAAC,QAAQ,EAAE,CAAC;IAC3E,CAAC;SAAM,IAAI,eAAe,KAAK,SAAS,EAAE,CAAC;QACzC,MAAM,CAAC,IAAI,CAAC,+BAA+B,CAAC,CAAC;QAC7C,cAAc,GAAG,eAAe,CAAC;IACnC,CAAC;SAAM,CAAC;QACN,MAAM,CAAC,IAAI,CAAC,yBAAyB,CAAC,CAAC;QACvC,OAAO,EAAE,CAAC;IACZ,CAAC;IAED,qCAAqC;IACrC,IAAI,MAAoB,CAAC;IACzB,IAAI,CAAC;QACH,MAAM,GAAG,IAAI,CAAC,KAAK,CAAC,cAAc,CAAiB,CAAC;IACtD,CAAC;IAAC,MAAM,CAAC;QACP,oEAAoE;QACpE,MAAM,CAAC,KAAK,CAAC,uCAAuC,CAAC,CAAC;QACtD,MAAM,IAAI,yBAAkB,CAAC,6BAA6B,CAAC,CAAC;IAC9D,CAAC;IAED,MAAM,GAAG,GAAiB,EAAE,CAAC;IAC7B,KAAK,MAAM,CAAC,IAAI,MAAM,EAAE,CAAC;QACvB,IAAI,CAAC,CAAC,GAAG,KAAK,SAAS,IAAI,CAAC,CAAC,IAAI,KAAK,SAAS,EAAE,CAAC;YAChD,yFAAyF;YACzF,MAAM,IAAI,yBAAkB,CAC1B,gDAAgD,CACjD,CAAC;QACJ,CAAC;QAED,kFAAkF;QAClF,iEAAiE;QACjE,IAAI,uBAAuB,IAAI,CAAC,CAAC,IAAI,KAAK,uBAAuB,EAAE,CAAC;YAClE,SAAS;QACX,CAAC;QAED,MAAM,WAAW,GAAG,CAAC,GAAuB,EAAW,EAAE;YACvD,OAAO,GAAG,CAAC,CAAC,CAAC,gBAAgB,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC,IAAI,CAAC;QACjD,CAAC,CAAC;QAEF,IACE,CAAC,WAAW,CAAC,CAAC,CAAC,IAAI,CAAC;YACpB,CAAC,WAAW,CAAC,CAAC,CAAC,IAAI,CAAC;YACpB,CAAC,WAAW,CAAC,CAAC,CAAC,GAAG,CAAC;YACnB,CAAC,WAAW,CAAC,CAAC,CAAC,QAAQ,CAAC;YACxB,CAAC,WAAW,CAAC,CAAC,CAAC,QAAQ,CAAC;YACxB,CAAC,WAAW,CAAC,CAAC,CAAC,KAAK,CAAC,EACrB,CAAC;YACD,MAAM,IAAI,yBAAkB,CAC1B,qEAAqE,CACtE,CAAC;QACJ,CAAC;QAED,GAAG,CAAC,IAAI,CAAC;YACP,IAAI,EAAE,CAAC,CAAC,IAAI;YACZ,IAAI,EAAE,CAAC,CAAC,IAAI;YACZ,GAAG,EAAE,CAAC,CAAC,GAAG;YACV,QAAQ,EAAE,CAAC,CAAC,QAAQ;YACpB,QAAQ,EAAE,CAAC,CAAC,QAAQ;YACpB,KAAK,EAAE,CAAC,CAAC,KAAK;SACf,CAAC,CAAC;IACL,CAAC;IACD,OAAO,GAAG,CAAC;AACb,CAAC"}
\ No newline at end of file
diff --git a/src/start-proxy.ts b/src/start-proxy.ts
index 7f890fbb77..51c6f2fc07 100644
--- a/src/start-proxy.ts
+++ b/src/start-proxy.ts
@@ -1,5 +1,6 @@
 import { parseLanguage, Language } from "./languages";
 import { Logger } from "./logging";
+import { ConfigurationError } from "./util";
 
 export type Credential = {
   type: string;
@@ -57,14 +58,16 @@ export function getCredentials(
   } catch {
     // Don't log the error since it might contain sensitive information.
     logger.error("Failed to parse the credentials data.");
-    throw new Error("Invalid credentials format.");
+    throw new ConfigurationError("Invalid credentials format.");
   }
 
   const out: Credential[] = [];
   for (const e of parsed) {
     if (e.url === undefined && e.host === undefined) {
       // The proxy needs one of these to work. If both are defined, the url has the precedence.
-      throw new Error("Invalid credentials - must specify host or url");
+      throw new ConfigurationError(
+        "Invalid credentials - must specify host or url",
+      );
     }
 
     // Filter credentials based on language if specified. `type` is the registry type.
@@ -85,7 +88,7 @@ export function getCredentials(
       !isPrintable(e.password) ||
       !isPrintable(e.token)
     ) {
-      throw new Error(
+      throw new ConfigurationError(
         "Invalid credentials - fields must contain only printable characters",
       );
     }