diff --git a/server/models/DiskUsage.ts b/server/models/DiskUsage.ts
index b2eba16b..5c9ac30c 100644
--- a/server/models/DiskUsage.ts
+++ b/server/models/DiskUsage.ts
@@ -55,7 +55,7 @@ class DiskUsage extends (EventEmitter as new () => TypedEmitter<DiskUsageEvents>
 
   updateDisks = () => {
     if (!isPlatformSupported()) {
-      return Promise.reject();
+      return Promise.reject(new Error());
     }
 
     return diskUsage[process.platform as SupportedPlatform]()
diff --git a/server/services/Transmission/clientGatewayService.ts b/server/services/Transmission/clientGatewayService.ts
index 999e92a4..9d604ae0 100644
--- a/server/services/Transmission/clientGatewayService.ts
+++ b/server/services/Transmission/clientGatewayService.ts
@@ -124,12 +124,12 @@ class TransmissionClientGatewayService extends ClientGatewayService {
       .then((torrents) => {
         const [torrent] = torrents;
         if (torrent == null) {
-          return Promise.reject();
+          throw new Error();
         }
 
         const {files, fileStats} = torrent;
         if (files.length !== fileStats.length) {
-          return Promise.reject();
+          throw new Error();
         }
 
         const torrentContents: Array<TorrentContent> = files.map((file, index) => {
@@ -163,7 +163,7 @@ class TransmissionClientGatewayService extends ClientGatewayService {
       .then((torrents) => {
         const [torrent] = torrents;
         if (torrent == null) {
-          return Promise.reject();
+          throw new Error();
         }
 
         const torrentPeers: Array<TorrentPeer> = torrent.peers
@@ -190,7 +190,7 @@ class TransmissionClientGatewayService extends ClientGatewayService {
       .then((torrents) => {
         const [torrent] = torrents;
         if (torrent == null) {
-          return Promise.reject();
+          throw new Error();
         }
 
         const torrentTrackers: Array<TorrentTracker> = torrent.trackerStats.map((tracker) => ({
diff --git a/server/services/Transmission/clientRequestManager.ts b/server/services/Transmission/clientRequestManager.ts
index f3c42ba9..5079b405 100644
--- a/server/services/Transmission/clientRequestManager.ts
+++ b/server/services/Transmission/clientRequestManager.ts
@@ -60,7 +60,7 @@ class ClientRequestManager {
 
     await this.sessionID;
 
-    return authFailed ? Promise.reject() : Promise.resolve();
+    return authFailed ? Promise.reject(new Error()) : Promise.resolve();
   }
 
   async getRequestHeaders(): Promise<Record<string, string>> {
diff --git a/server/services/qBittorrent/clientRequestManager.ts b/server/services/qBittorrent/clientRequestManager.ts
index 96a4f5ac..584f2913 100644
--- a/server/services/qBittorrent/clientRequestManager.ts
+++ b/server/services/qBittorrent/clientRequestManager.ts
@@ -58,7 +58,7 @@ class ClientRequestManager {
 
     await this.authCookie;
 
-    return authFailed ? Promise.reject() : Promise.resolve();
+    return authFailed ? Promise.reject(new Error()) : Promise.resolve();
   }
 
   async getAppPreferences(): Promise<QBittorrentAppPreferences> {
diff --git a/server/services/rTorrent/clientGatewayService.ts b/server/services/rTorrent/clientGatewayService.ts
index b141d395..5bb2585d 100644
--- a/server/services/rTorrent/clientGatewayService.ts
+++ b/server/services/rTorrent/clientGatewayService.ts
@@ -307,7 +307,7 @@ class RTorrentClientGatewayService extends ClientGatewayService {
         .catch(() => undefined);
 
       if (isMultiFile == null || isMultiFile.length !== hashes.length) {
-        return Promise.reject();
+        throw new Error();
       }
 
       hashes.forEach((hash, index) => {
diff --git a/server/services/rTorrent/util/XMLRPCDeserializer.js b/server/services/rTorrent/util/XMLRPCDeserializer.js
index 788a562b..4ba7a0c6 100644
--- a/server/services/rTorrent/util/XMLRPCDeserializer.js
+++ b/server/services/rTorrent/util/XMLRPCDeserializer.js
@@ -91,7 +91,7 @@ const closeTag = (elementName) => {
       break;
 
     default:
-      rejectCallback(`Unexpected XML-RPC Tag: ${elementName}`);
+      rejectCallback(new Error(`Unexpected XML-RPC Tag: ${elementName}`));
   }
 };
 
@@ -132,7 +132,7 @@ const deserialize = (data) =>
       return resolve(dataStack[0]);
     }
 
-    return reject('truncated response was received');
+    return reject(new Error('truncated response was received'));
   });
 
 export default {deserialize};