diff --git a/chrome/content/zotero/standalone/standalone.js b/chrome/content/zotero/standalone/standalone.js
index bfaa941c72..4b0202ef4d 100644
--- a/chrome/content/zotero/standalone/standalone.js
+++ b/chrome/content/zotero/standalone/standalone.js
@@ -161,7 +161,12 @@ const ZoteroStandalone = new function() {
 		if (format.mode == 'export') {
 			try {
 				let obj = Zotero.Translators.get(format.id);
-				copyExport.label = Zotero.getString('quickCopy.copyAs', obj.label);
+				if (obj) {
+					copyExport.label = Zotero.getString('quickCopy.copyAs', obj.label);
+				}
+				else {
+					copyExport.hidden = true;
+				}
 			}
 			catch (e) {
 				if (!(e instanceof Zotero.Exception.UnloadedDataException && e.dataType == 'translators')) {
diff --git a/chrome/content/zotero/xpcom/quickCopy.js b/chrome/content/zotero/xpcom/quickCopy.js
index 5bd968bf87..cde60d04ec 100644
--- a/chrome/content/zotero/xpcom/quickCopy.js
+++ b/chrome/content/zotero/xpcom/quickCopy.js
@@ -182,7 +182,8 @@ Zotero.QuickCopy = new function() {
 		}
 		
 		if (!_siteSettings) {
-			throw new Zotero.Exception.UnloadedDataException("Quick Copy site settings not loaded");
+			Zotero.debug("Quick Copy site settings not loaded", 2);
+			return quickCopyPref;
 		}
 		
 		var matches = [];
@@ -461,6 +462,10 @@ Zotero.QuickCopy = new function() {
 			Zotero.debug(`Preloading ${format.id} for Quick Copy`);
 			await Zotero.Translators.init();
 			let translator = Zotero.Translators.get(format.id);
+			if (!translator) {
+				Zotero.logError(`Translator ${format.id} not found`);
+				return;
+			}
 			translator.cacheCode = true;
 			await translator.getCode();
 		}