diff --git a/Koha/REST/V1/ERM/EHoldings/Titles/Local.pm b/Koha/REST/V1/ERM/EHoldings/Titles/Local.pm
index c45d4d6914..ac8818afe5 100644
--- a/Koha/REST/V1/ERM/EHoldings/Titles/Local.pm
+++ b/Koha/REST/V1/ERM/EHoldings/Titles/Local.pm
@@ -285,7 +285,7 @@ sub import_from_kbart_file {
         if ( $file->{filename} !~ /\.csv$/ && $file->{filename} !~ /\.tsv$/ ) {
             return $c->render(
                 status  => 201,
-                openapi => { invalid_filetype => 1 }
+                openapi => { warnings => { invalid_filetype => 1 } }
             );
         }
 
diff --git a/koha-tmpl/intranet-tmpl/prog/js/vue/components/ERM/EHoldingsLocalTitlesKBARTImport.vue b/koha-tmpl/intranet-tmpl/prog/js/vue/components/ERM/EHoldingsLocalTitlesKBARTImport.vue
index 5049bf9cb0..d2d18bb194 100644
--- a/koha-tmpl/intranet-tmpl/prog/js/vue/components/ERM/EHoldingsLocalTitlesKBARTImport.vue
+++ b/koha-tmpl/intranet-tmpl/prog/js/vue/components/ERM/EHoldingsLocalTitlesKBARTImport.vue
@@ -86,9 +86,10 @@ import { ref, inject } from "vue"
 
 export default {
     setup() {
-        const { setMessage } = inject("mainStore")
+        const { setMessage, setWarning } = inject("mainStore")
         return {
             setMessage,
+            setWarning,
         }
     },
     data() {
@@ -171,11 +172,11 @@ export default {
                         )}</p>`
                         this.setMessage(message, true)
                     }
-                    if (success.invalid_filetype) {
+                    if (success.warnings.invalid_filetype) {
                         message += `<p>${this.$__(
                             "The file must be in .tsv or .csv format, please convert your file and try again."
                         )}</p>`
-                        setWarning(message)
+                        this.setWarning(message)
                     }
                 },
                 error => {}