diff --git a/invokeai/frontend/web/src/common/util/zodErrorLogger.ts b/invokeai/frontend/web/src/common/util/zodErrorLogger.ts
new file mode 100644
index 00000000000..7fe5ab6e2e0
--- /dev/null
+++ b/invokeai/frontend/web/src/common/util/zodErrorLogger.ts
@@ -0,0 +1,45 @@
+import type { z } from 'zod';
+
+interface ZodErrorLogOptions {
+  context?: string;
+}
+
+/**
+ * Logs Zod validation errors with a simple description and complete error data.
+ */
+export const logZodError = (error: z.ZodError, options: ZodErrorLogOptions = {}): void => {
+  const { context = 'Validation' } = options;
+
+  // eslint-disable-next-line no-console
+  console.error(`${context} failed with ${error.issues.length} errors:`, {
+    summary: error.issues.map((issue) => `${issue.path.join('.') || 'root'}: ${issue.message}`),
+    issues: error.issues,
+  });
+};
+
+/**
+ * Creates a human-readable summary of Zod errors suitable for user-facing messages.
+ * Limits the number of errors shown and provides a count of remaining errors.
+ */
+export const createZodErrorSummary = (
+  error: z.ZodError,
+  maxErrors: number = 10,
+  pathFormatter?: (path: string, message: string) => string
+): string => {
+  const defaultFormatter = (path: string, message: string) => `${path || 'Root'}: ${message}`;
+
+  const formatter = pathFormatter || defaultFormatter;
+
+  const errors = error.issues.map((issue) => formatter(issue.path.join('.'), issue.message));
+
+  const visibleErrors = errors.slice(0, maxErrors);
+  const remainingCount = errors.length - maxErrors;
+
+  let summary = visibleErrors.join('; ');
+
+  if (remainingCount > 0) {
+    summary += ` (+${remainingCount} more error${remainingCount === 1 ? '' : 's'})`;
+  }
+
+  return summary;
+};
diff --git a/invokeai/frontend/web/src/features/workflowLibrary/hooks/useLoadWorkflowFromFile.tsx b/invokeai/frontend/web/src/features/workflowLibrary/hooks/useLoadWorkflowFromFile.tsx
index c3c0849ed10..26a3c3f7153 100644
--- a/invokeai/frontend/web/src/features/workflowLibrary/hooks/useLoadWorkflowFromFile.tsx
+++ b/invokeai/frontend/web/src/features/workflowLibrary/hooks/useLoadWorkflowFromFile.tsx
@@ -39,8 +39,21 @@ export const useLoadWorkflowFromFile = () => {
             dispatch(workflowLoadedFromFile());
             onSuccess?.(validatedWorkflow);
             resolve(validatedWorkflow);
-          } catch {
-            // This is catching the error from the parsing the JSON file
+          } catch (e) {
+            // Log file parsing/loading errors
+            if (e instanceof SyntaxError) {
+              // eslint-disable-next-line no-console
+              console.error('Workflow file JSON parsing failed:', {
+                fileName: file.name,
+                error: e.message,
+              });
+            } else {
+              // eslint-disable-next-line no-console
+              console.error('Workflow file loading failed:', {
+                fileName: file.name,
+                error: e,
+              });
+            }
             onError?.();
             reject();
           } finally {
diff --git a/invokeai/frontend/web/src/features/workflowLibrary/hooks/useValidateAndLoadWorkflow.ts b/invokeai/frontend/web/src/features/workflowLibrary/hooks/useValidateAndLoadWorkflow.ts
index 39d5a9cd917..39202350da7 100644
--- a/invokeai/frontend/web/src/features/workflowLibrary/hooks/useValidateAndLoadWorkflow.ts
+++ b/invokeai/frontend/web/src/features/workflowLibrary/hooks/useValidateAndLoadWorkflow.ts
@@ -1,5 +1,6 @@
 import { logger } from 'app/logging/logger';
 import { useAppDispatch } from 'app/store/storeHooks';
+import { createZodErrorSummary, logZodError } from 'common/util/zodErrorLogger';
 import { getIsFormEmpty } from 'features/nodes/components/sidePanel/builder/form-manipulation';
 import { $nodeExecutionStates } from 'features/nodes/hooks/useNodeExecutionState';
 import { $templates, workflowLoaded } from 'features/nodes/store/nodesSlice';
@@ -16,7 +17,6 @@ import { useCallback } from 'react';
 import { serializeError } from 'serialize-error';
 import { checkBoardAccess, checkImageAccess, checkModelAccess } from 'services/api/hooks/accessChecks';
 import { z } from 'zod';
-import { fromZodError } from 'zod-validation-error/v4';
 
 const log = logger('workflows');
 
@@ -120,10 +120,46 @@ export const useValidateAndLoadWorkflow = () => {
           });
         } else if (e instanceof z.ZodError) {
           // There was a problem validating the workflow itself
-          const { message } = fromZodError(e, {
-            prefix: t('nodes.workflowValidation'),
-          });
-          log.error({ error: serializeError(e) }, message);
+
+          // Log comprehensive error information for developers
+          logZodError(e, { context: 'Workflow validation' });
+
+          // Create human-readable message for toast with node-specific formatting
+          const pathFormatter = (path: string, message: string) => {
+            const nodeMatch = path.match(/nodes\.(\d+)\.data\.inputs\.([^.]+)(?:\.(.+))?/);
+            const nodeDataMatch = path.match(/nodes\.(\d+)\.data\.([^.]+)/);
+            const nodeMatch2 = path.match(/nodes\.(\d+)\.([^.]+)/);
+
+            if (nodeMatch) {
+              const [, nodeIndex, fieldName, subField] = nodeMatch;
+              const fieldPath = subField ? `${fieldName}.${subField}` : fieldName;
+              return `Node ${parseInt(nodeIndex, 10) + 1} input "${fieldPath}": ${message}`;
+            } else if (nodeDataMatch) {
+              const [, nodeIndex, fieldName] = nodeDataMatch;
+              return `Node ${parseInt(nodeIndex, 10) + 1} data "${fieldName}": ${message}`;
+            } else if (nodeMatch2) {
+              const [, nodeIndex, fieldName] = nodeMatch2;
+              return `Node ${parseInt(nodeIndex, 10) + 1} "${fieldName}": ${message}`;
+            } else if (path.startsWith('nodes.')) {
+              const pathParts = path.split('.');
+              const nodeIndex = pathParts[1];
+              const remainingPath = pathParts.slice(2).join('.');
+              return `Node ${parseInt(nodeIndex, 10) + 1} (${remainingPath || 'general'}): ${message}`;
+            } else {
+              return `${path || 'Workflow'}: ${message}`;
+            }
+          };
+
+          const errorSummary = createZodErrorSummary(e, 10, pathFormatter);
+          const message = `${t('nodes.workflowValidation')}: ${errorSummary}`;
+
+          log.error(
+            {
+              error: serializeError(e),
+              totalIssues: e.issues.length,
+            },
+            `Workflow validation failed with ${e.issues.length} issues: ${message}`
+          );
           toast({
             id: 'UNABLE_TO_VALIDATE_WORKFLOW',
             title: t('nodes.unableToValidateWorkflow'),
diff --git a/invokeai/frontend/web/vite.config.mts b/invokeai/frontend/web/vite.config.mts
index a697148322d..fa11de36353 100644
--- a/invokeai/frontend/web/vite.config.mts
+++ b/invokeai/frontend/web/vite.config.mts
@@ -3,7 +3,7 @@ import react from '@vitejs/plugin-react-swc';
 import path from 'path';
 import { visualizer } from 'rollup-plugin-visualizer';
 import type { PluginOption } from 'vite';
-import { defineConfig } from 'vite';
+import { defineConfig, loadEnv } from 'vite';
 import cssInjectedByJsPlugin from 'vite-plugin-css-injected-by-js';
 import dts from 'vite-plugin-dts';
 import eslint from 'vite-plugin-eslint';
@@ -11,6 +11,15 @@ import tsconfigPaths from 'vite-tsconfig-paths';
 import { loggerContextPlugin } from './vite-plugin-logger-context';
 
 export default defineConfig(({ mode }) => {
+  // Load env file based on mode in the current working directory.
+  // Set the third parameter to '' to load all env regardless of the VITE_ prefix.
+  const env = loadEnv(mode, process.cwd(), '');
+
+  // Get InvokeAI API base URL from environment variable, default to localhost
+  const apiBaseUrl = env.INVOKEAI_API_BASE_URL || 'http://127.0.0.1:9090';
+  const apiHost = new URL(apiBaseUrl).host;
+  const wsProtocol = apiBaseUrl.startsWith('https') ? 'wss' : 'ws';
+
   if (mode === 'package') {
     return {
       base: './',
@@ -81,16 +90,16 @@ export default defineConfig(({ mode }) => {
     server: {
       proxy: {
         '/ws/socket.io': {
-          target: 'ws://127.0.0.1:9090',
+          target: `${wsProtocol}://${apiHost}`,
           ws: true,
         },
         '/openapi.json': {
-          target: 'http://127.0.0.1:9090/openapi.json',
+          target: `${apiBaseUrl}/openapi.json`,
           rewrite: (path) => path.replace(/^\/openapi.json/, ''),
           changeOrigin: true,
         },
         '/api/': {
-          target: 'http://127.0.0.1:9090/api/',
+          target: `${apiBaseUrl}/api/`,
           rewrite: (path) => path.replace(/^\/api/, ''),
           changeOrigin: true,
         },