Fix translations

exam/react/public/locales/de/translation.json

@@ -1,14 +1,13 @@
 {
-  "": "",
   "NotFound_user:login": "Benutzer existiert nicht",
-  "Unauthorized:login": "Ungültige E-mail oder Passwort",
+  "Unauthorized:login": "Ungültige E-Mail oder Passwort",
 
   "GuestBook": "Gästebuch",
 
-  "E-Mail": "E-Mail",
+  "Email": "E-Mail",
   "Password": "Passwort",
 
-  "E-Mail required": "E-mail darf nicht leer sein",
+  "Email required": "E-Mail darf nicht leer sein",
   "Password required": "Passwort darf nicht leer sein",
 
   "Log in": "Anmelden",

exam/react/public/locales/en/translation.json

@@ -1,15 +1,13 @@
 {
-  "": "",
-
   "NotFound_user:login": "User does not exist",
-  "Unauthorized:login": "Invalid e-mail or password",
+  "Unauthorized:login": "Invalid email or password",
 
   "GuestBook": "GuestBook",
 
-  "E-Mail": "E-Mail",
+  "Email": "Email",
   "Password": "Password",
 
-  "E-Mail required": "E-mail required",
+  "Email required": "Email required",
   "Password required": "Password required",
 
   "Log in": "Log in",

exam/react/src/components/Forms/Login/Login.tsx

@@ -58,7 +58,7 @@ const Login: FC = () => {
                   onBlur={field.handleBlur}
                   onChange={(e) => field.handleChange(e.target.value)}
                   size="small"
-                  label={t('E-Mail')}
+                  label={t('EMail')}
                   required
                   error={field.state.meta.isTouched && field.state.meta.errors.length > 0}
                   helperText={field.state.meta.isTouched ? field.state.meta.errors.join(',') : ''}
@@ -106,7 +106,7 @@ const Login: FC = () => {
             </>
           )}
         />
-        <Typography color="error.main">{t(...handleError(error, 'login'))}</Typography>
+        {error && <Typography color="error.main">{t(...handleError(error, 'login'))}</Typography>}
       </Box>
     </form>
   );