diff -r d15779cf3982 -r ded1b5639bd3 src/main/java/de/uapcore/lightpit/modules/ProjectsModule.java
--- a/src/main/java/de/uapcore/lightpit/modules/ProjectsModule.java	Tue May 19 16:55:58 2020 +0200
+++ b/src/main/java/de/uapcore/lightpit/modules/ProjectsModule.java	Tue May 19 16:57:29 2020 +0200
@@ -106,7 +106,7 @@
     }
 
     @RequestMapping(requestPath = "commit", method = HttpMethod.POST)
-    public ResponseType commit(HttpServletRequest req, DataAccessObjects dao) {
+    public ResponseType commit(HttpServletRequest req, DataAccessObjects dao) throws SQLException {
 
         Project project = new Project(-1);
         try {
@@ -126,6 +126,7 @@
         } catch (NoSuchElementException | NumberFormatException | SQLException ex) {
             // TODO: set request attribute with error text
             req.setAttribute("project", project);
+            req.setAttribute("users", dao.getUserDao().list());
             setDynamicFragment(req, "project-form");
             LOG.warn("Form validation failure: {}", ex.getMessage());
             LOG.debug("Details:", ex);