diff --git a/frontend/packages/dashboard/src/common.js b/frontend/packages/dashboard/src/common.js
index 16a37f76..7b6dff74 100644
--- a/frontend/packages/dashboard/src/common.js
+++ b/frontend/packages/dashboard/src/common.js
@@ -85,12 +85,18 @@ export function bindAsyncForms(onSuccess) {
     // Errors are surfaced via themedToast; the caller does not re-throw
     // so asyncBtn's finally always runs (restoring the button).
     const doSubmit = async () => {
-      const resp = await fetch(f.action, {
-        method: f.method || 'POST',
-        headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
-        body: new URLSearchParams(new FormData(f)),
-        redirect: 'manual',
-      });
+      let resp;
+      try {
+        resp = await fetch(f.action, {
+          method: f.method || 'POST',
+          headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+          body: new URLSearchParams(new FormData(f)),
+          redirect: 'manual',
+        });
+      } catch (err) {
+        themedToast('action failed: ' + err, { type: 'error' });
+        return;
+      }
       const ok = resp.ok || resp.type === 'opaqueredirect'
         || (resp.status >= 200 && resp.status < 400);
       if (!ok) {