diff --git a/partials/landingpages/modules/setup.php b/partials/landingpages/modules/setup.php
index fbfe9ce..ac6373e 100644
--- a/partials/landingpages/modules/setup.php
+++ b/partials/landingpages/modules/setup.php
@@ -1742,12 +1742,27 @@ $activeDbGroup = $testGroup !== null && array_key_exists($testGroup, $dbGroups)
               });
             });
           });
+          try {
+            console.groupCollapsed('[scheduler] collect payload');
+            for (const pair of payload.entries()) {
+              console.log(pair[0], pair[1]);
+            }
+            console.groupEnd();
+          } catch (error) {
+            console.warn('[scheduler] payload debug failed', error);
+          }
           return payload;
         };
 
         const persistScheduler = async () => {
           if (!form) return true;
-          const response = await fetch(form.action || window.location.href, {
+          const url = form.action || window.location.href;
+          console.log('[scheduler] persist start', {
+            url,
+            method: 'POST',
+            hasForm: !!form,
+          });
+          const response = await fetch(url, {
             method: 'POST',
             body: collectSchedulerPayload(),
             credentials: 'same-origin',
@@ -1756,20 +1771,31 @@ $activeDbGroup = $testGroup !== null && array_key_exists($testGroup, $dbGroups)
               'X-Requested-With': 'XMLHttpRequest',
             },
           });
+          console.log('[scheduler] persist response meta', {
+            ok: response.ok,
+            status: response.status,
+            redirected: response.redirected,
+            contentType: response.headers.get('content-type'),
+            url: response.url,
+          });
           if (!response.ok) {
             throw new Error(`Scheduler konnte nicht gespeichert werden (${response.status}).`);
           }
           const raw = await response.text();
+          console.log('[scheduler] persist raw response', raw);
           let data = null;
           try {
             data = JSON.parse(raw);
           } catch (error) {
+            console.error('[scheduler] persist json parse failed', error);
             throw new Error(`Scheduler-Antwort war kein JSON: ${raw.slice(0, 160)}`);
           }
+          console.log('[scheduler] persist parsed response', data);
           if (!data || data.ok !== true) {
             throw new Error(data?.message || 'Scheduler konnte nicht gespeichert werden.');
           }
           applyStatusUpdates(data.statuses || []);
+          console.log('[scheduler] persist success');
           return true;
         };
 
@@ -1888,6 +1914,12 @@ $activeDbGroup = $testGroup !== null && array_key_exists($testGroup, $dbGroups)
         const saveModal = async () => {
           const entry = modalState.entry;
           if (!entry) return;
+          console.log('[scheduler] modal save click', {
+            tab: modalState.tab,
+            entryIndex: entry.dataset.entryIndex || null,
+            enabled: modalFields.enabled.value,
+            timezone: modalFields.timezone.value,
+          });
 
           const modeNode = getEntryField(entry, '[data-cron-builder-mode]');
           const kindNode = getEntryField(entry, '[data-cron-builder-kind]');
@@ -1901,6 +1933,7 @@ $activeDbGroup = $testGroup !== null && array_key_exists($testGroup, $dbGroups)
           const timezoneNode = getEntryField(entry, '[data-cron-timezone]');
 
           if (!modeNode || !kindNode || !timeNode || !weekdayNode || !monthDayNode || !intervalHoursNode || !intervalDaysNode || !enabledNode || !expressionNode || !timezoneNode) {
+            console.error('[scheduler] modal save aborted: missing entry fields');
             return;
           }
 
@@ -1931,8 +1964,10 @@ $activeDbGroup = $testGroup !== null && array_key_exists($testGroup, $dbGroups)
           }
           try {
             await persistScheduler();
+            console.log('[scheduler] modal save complete, closing modal');
             closeModal();
           } catch (error) {
+            console.error('[scheduler] modal save failed', error);
             alert(error instanceof Error ? error.message : 'Scheduler konnte nicht gespeichert werden.');
           } finally {
             if (modalFields.saveButton) {