diff --git a/web/app/components/base/prompt-editor/utils.ts b/web/app/components/base/prompt-editor/utils.ts
index 6d7d636e55..4b2570e697 100644
--- a/web/app/components/base/prompt-editor/utils.ts
+++ b/web/app/components/base/prompt-editor/utils.ts
@@ -296,7 +296,7 @@ export function $splitNodeContainingQuery(match: MenuTextMatch): TextNode | null
 }
 
 export function textToEditorState(text: string) {
-  const paragraph = text ? text.split('\n') : ['']
+  const paragraph = text && (typeof text === 'string') ? text.split('\n') : ['']
 
   return JSON.stringify({
     root: {