diff --git a/src/Application.ts b/src/Application.ts
index 77669f3..d1a6d5f 100644
--- a/src/Application.ts
+++ b/src/Application.ts
@@ -8,7 +8,7 @@ import MysqlConnectionManager from "./db/MysqlConnectionManager";
 import Migration, {MigrationType} from "./db/Migration";
 import {Type} from "./Utils";
 import LogRequestsComponent from "./components/LogRequestsComponent";
-import {ValidationBag} from "./db/Validator";
+import {ValidationBag, ValidationError} from "./db/Validator";
 import config from "config";
 import * as fs from "fs";
 import SecurityError from "./SecurityError";
@@ -91,7 +91,15 @@ export default abstract class Application implements Extendable<ApplicationCompo
         app.use((err: unknown, req: Request, res: Response, next: NextFunction) => {
             if (res.headersSent) return next(err);
 
+            // Transform single validation errors into a validation bag for convenience
+            if (err instanceof ValidationError) {
+                const bag = new ValidationBag();
+                bag.addMessage(err);
+                err = bag;
+            }
+
             if (err instanceof ValidationBag) {
+                const bag = err;
                 res.format({
                     json: () => {
                         res.status(401);
@@ -99,15 +107,15 @@ export default abstract class Application implements Extendable<ApplicationCompo
                             status: 'error',
                             code: 401,
                             message: 'Invalid form data',
-                            messages: err.getMessages(),
+                            messages: bag.getMessages(),
                         });
                     },
                     text: () => {
                         res.status(401);
-                        res.send('Error: ' + err.getMessages());
+                        res.send('Error: ' + bag.getMessages());
                     },
                     html: () => {
-                        req.flash('validation', err.getMessages());
+                        req.flash('validation', bag.getMessages());
                         res.redirectBack();
                     },
                 });
diff --git a/src/db/Validator.ts b/src/db/Validator.ts
index 88fe9d9..9440456 100644
--- a/src/db/Validator.ts
+++ b/src/db/Validator.ts
@@ -313,7 +313,7 @@ export class ValidationBag<V> extends Error {
     }
 }
 
-export abstract class ValidationError<V> extends Error {
+export class ValidationError<V> extends Error {
     public rawValueToHuman?: (val: V) => string;
     public thingName?: string;
     public value?: V;