diff --git a/backend/src/data/Phisherman.ts b/backend/src/data/Phisherman.ts
index 25fb59ce..44fe3fa5 100644
--- a/backend/src/data/Phisherman.ts
+++ b/backend/src/data/Phisherman.ts
@@ -53,11 +53,20 @@ function getKeyCacheRepository(): Repository<PhishermanKeyCacheEntry> {
 }
 
 class PhishermanApiError extends Error {
+  method: string;
+  url: string;
   status: number;
-  constructor(status: number, message: string) {
+
+  constructor(method: string, url: string, status: number, message: string) {
     super(message);
+    this.method = method;
+    this.url = url;
     this.status = status;
   }
+
+  toString() {
+    return `Error ${this.status} in ${this.method} ${this.url}: ${this.message}`;
+  }
 }
 
 export function hasPhishermanMasterAPIKey() {
@@ -92,7 +101,7 @@ async function apiCall<T>(
     return pendingApiRequests.get(key)! as Promise<T>;
   }
 
-  const requestPromise = (async () => {
+  let requestPromise = (async () => {
     const response = await fetch(url, {
       method,
       headers: new Headers({
@@ -104,11 +113,11 @@ async function apiCall<T>(
     });
     const data = await response.json().catch(() => null);
     if (!response.ok || (data as any)?.success === false) {
-      throw new PhishermanApiError(response.status, (data as any)?.message ?? "");
+      throw new PhishermanApiError(method, url, response.status, (data as any)?.message ?? "");
     }
     return data;
   })();
-  requestPromise.finally(() => {
+  requestPromise = requestPromise.finally(() => {
     pendingApiRequests.delete(key);
   });
   pendingApiRequests.set(key, requestPromise);
diff --git a/backend/src/plugins/Phisherman/PhishermanPlugin.ts b/backend/src/plugins/Phisherman/PhishermanPlugin.ts
index 50a6c321..4b8a9d5e 100644
--- a/backend/src/plugins/Phisherman/PhishermanPlugin.ts
+++ b/backend/src/plugins/Phisherman/PhishermanPlugin.ts
@@ -37,13 +37,20 @@ export const PhishermanPlugin = zeppelinGuildPlugin<PhishermanPluginType>()({
 
     if (!hasPhishermanMasterAPIKey()) {
       // tslint:disable-next-line:no-console
-      console.warn("Could not load Phisherman plugin: master API key is missing");
+      console.warn("[PHISHERMAN] Could not load Phisherman plugin: master API key is missing");
       return;
     }
 
     const apiKey = pluginData.config.get().api_key;
-    if (apiKey && (await phishermanApiKeyIsValid(apiKey).catch(() => false))) {
-      pluginData.state.validApiKey = apiKey;
+    if (apiKey) {
+      const isValid = await phishermanApiKeyIsValid(apiKey).catch((err) => {
+        // tslint:disable-next-line:no-console
+        console.warn(`[PHISHERMAN] Error checking user API key validity:\n${err.toString()}`);
+        return false;
+      });
+      if (isValid) {
+        pluginData.state.validApiKey = apiKey;
+      }
     }
   },
 });