diff --git a/scripts/sync.js b/scripts/sync.js
index b82f0e137..e14fecb16 100644
--- a/scripts/sync.js
+++ b/scripts/sync.js
@@ -3,16 +3,23 @@ const fs = require("fs");
 const fsprom = require("fs/promises");
 require('dotenv').config()
 
-async function copyFileIgnoreMissing(source, destination) {
-  try {
-    await fsprom.copyFile(source, destination);
-  } catch (err) {
-    if (err.code === 'ENOENT') {
-      // ignore missing source files
-    } else {
-      // everything else
-      throw err;
-    }
+
+function missingIndexTsHandler(err){
+  if (err.code === 'ENOENT') {
+    // Just give some advice to the user
+    console.error('./build/index.d.ts not found. You have to generate it with "yarn definitions"');
+  }
+
+  // Keep the chain failed
+  throw err;
+}
+
+function ignoreFileNotFound(err){
+  if (err.code === 'ENOENT') {
+    // Ignore file not found
+  } else {
+    // Keep the chain failed
+    throw err;
   }
 }
 
@@ -21,7 +28,7 @@ async function run(ARKHAM_CARDS){
   const exists = fs.existsSync(ARKHAM_CARDS);
   if (exists === true){
     await Promise.all([
-      fsprom.copyFile('./build/index.d.ts', `${ARKHAM_CARDS}/src/data/scenario/types.d.ts`),
+      fsprom.copyFile('./build/index.d.ts', `${ARKHAM_CARDS}/src/data/scenario/types.d.ts`).catch( missingIndexTsHandler ),
       fsprom.copyFile('./build/standalone.json', `${ARKHAM_CARDS}/assets/generated/standaloneScenarios.json`),
       fsprom.copyFile('./build/allCampaigns.json', `${ARKHAM_CARDS}/assets/generated/allCampaigns.json`),
       fsprom.copyFile('./build/scenarioNames.json', `${ARKHAM_CARDS}/assets/generated/scenarioNames.json`),
@@ -32,17 +39,17 @@ async function run(ARKHAM_CARDS){
       fsprom.copyFile('./chaos_tokens.json', `${ARKHAM_CARDS}/assets/generated/chaosOdds.json`),
       fsprom.copyFile('./rules/en/rules.json', `${ARKHAM_CARDS}/assets/generated/rules.json`)
     ]);
-  
+
     // I18n files
     const langs=['es', 'ko', 'it', 'fr', 'ru', 'de', 'zh', 'pt', 'pl', 'vi', 'cs', 'zh-cn'];
     await Promise.allSettled( langs.flatMap(async (lang)=>{
       return [
-        copyFileIgnoreMissing(`./build/allCampaigns_${lang}.json`, `${ARKHAM_CARDS}/assets/generated/allCampaigns_${lang}.json`),
-        copyFileIgnoreMissing(`./build/scenarioNames_${lang}.json`, `${ARKHAM_CARDS}/assets/generated/scenarioNames_${lang}.json`),
-        copyFileIgnoreMissing(`./build/campaignLogs_${lang}.json`, `${ARKHAM_CARDS}/assets/generated/campaignLogs_${lang}.json`),
-        copyFileIgnoreMissing(`./build/encounterSets_${lang}.json`, `${ARKHAM_CARDS}/assets/generated/encounterSets_${lang}.json`),
-        copyFileIgnoreMissing(`./errata/${lang}/errata.json`, `${ARKHAM_CARDS}/assets/generated/campaignErrata_${lang}.json`),
-        copyFileIgnoreMissing(`./rules/${lang}/rules.json`, `${ARKHAM_CARDS}/assets/generated/rules_${lang}.json`)
+        fsprom.copyFile(`./build/allCampaigns_${lang}.json`, `${ARKHAM_CARDS}/assets/generated/allCampaigns_${lang}.json`).catch( ignoreFileNotFound ),
+        fsprom.copyFile(`./build/scenarioNames_${lang}.json`, `${ARKHAM_CARDS}/assets/generated/scenarioNames_${lang}.json`).catch( ignoreFileNotFound ),
+        fsprom.copyFile(`./build/campaignLogs_${lang}.json`, `${ARKHAM_CARDS}/assets/generated/campaignLogs_${lang}.json`).catch( ignoreFileNotFound ),
+        fsprom.copyFile(`./build/encounterSets_${lang}.json`, `${ARKHAM_CARDS}/assets/generated/encounterSets_${lang}.json`).catch( ignoreFileNotFound ),
+        fsprom.copyFile(`./errata/${lang}/errata.json`, `${ARKHAM_CARDS}/assets/generated/campaignErrata_${lang}.json`).catch( ignoreFileNotFound ),
+        fsprom.copyFile(`./rules/${lang}/rules.json`, `${ARKHAM_CARDS}/assets/generated/rules_${lang}.json`).catch( ignoreFileNotFound )
       ]
     }));