diff --git a/apps/effectcraft-web/web/sw.js b/apps/effectcraft-web/web/sw.js
index 8c7efc2e..4acbeeee 100644
--- a/apps/effectcraft-web/web/sw.js
+++ b/apps/effectcraft-web/web/sw.js
@@ -32,13 +32,15 @@ self.addEventListener("fetch", (event) => {
   if (req.method !== "GET" || url.origin !== self.location.origin) return;
   event.respondWith(
     (async () => {
-      const cache = await caches.open(CACHE);
-      // The page itself regardless of its query (?empty, ?demo…).
-      const key = req.mode === "navigate" ? new URL("./", self.registration.scope).href : req;
-      const hit = await cache.match(key, { ignoreSearch: req.mode === "navigate" });
-      if (hit) return hit;
+      const cache = await caches.open(CACHE).catch(() => null);
+      if (cache) {
+        // The page itself regardless of its query (?empty, ?demo…).
+        const key = req.mode === "navigate" ? new URL("./", self.registration.scope).href : req;
+        const hit = await cache.match(key, { ignoreSearch: req.mode === "navigate" }).catch(() => null);
+        if (hit) return hit;
+      }
       const res = await fetch(req);
-      if (res.ok && res.type === "basic") cache.put(req, res.clone());
+      if (cache && res.ok && res.type === "basic") void cache.put(req, res.clone()).catch(() => {});
       return res;
     })(),
   );
diff --git a/crates/expr/src/prelude.js b/crates/expr/src/prelude.js
index 4da7bc63..df6ed3ff 100644
--- a/crates/expr/src/prelude.js
+++ b/crates/expr/src/prelude.js
@@ -461,7 +461,7 @@ Comp.prototype = {
       var l = this.layer(i);
       if (l.__info[10] === 'Camera' && l.active) return l;
     }
-    __err('Composition "' + this.name + '" has no active camera');
+    return __err('Composition "' + this.name + '" has no active camera');
   },
   layer: function (a, rel) {
     if (a !== null && typeof a === 'object' && a.__isLayer) return this.layer(a.index + (rel || 0));
diff --git a/crates/script/src/scriptui.js b/crates/script/src/scriptui.js
index af1e14b5..52c65efb 100644
--- a/crates/script/src/scriptui.js
+++ b/crates/script/src/scriptui.js
@@ -840,7 +840,7 @@ function __uiJson(c, inherited) {
     o.value = Number(c.value) || 0;
     o.min = Number(c.minvalue) || 0;
     o.max = Number(c.maxvalue);
-    if (!(o.max === o.max)) o.max = 100;
+    if (Number.isNaN(o.max)) o.max = 100;
   }
   if (c.items) {
     o.items = c.items.map(function (it) { return String(it.text); });