diff --git a/src/pages/sign/index.tsx b/src/pages/sign/index.tsx
index 0e0b135..64c9df6 100644
--- a/src/pages/sign/index.tsx
+++ b/src/pages/sign/index.tsx
@@ -542,10 +542,13 @@ export const SignPage = () => {
     setLoadingSpinnerDesc('Signing nostr event')
 
     const prevSig = getPrevSignersSig(hexToNpub(usersPubkey!))
-    if (!prevSig) return
+    if (!prevSig) {
+      setIsLoading(false)
+      toast.error('Previous signature is invalid')
+      return
+    }
 
-    const marks = getSignerMarksForMeta()
-    if (!marks) return
+    const marks = getSignerMarksForMeta() || []
 
     const signedEvent = await signEventForMeta({ prevSig, marks })
     if (!signedEvent) return