diff --git a/codex/rest/api.nim b/codex/rest/api.nim
index 134aa8d2..a64d26cf 100644
--- a/codex/rest/api.nim
+++ b/codex/rest/api.nim
@@ -179,7 +179,7 @@ proc initDataApi(node: CodexNodeRef, repoStore: RepoStore, router: var RestRoute
     trace "Handling file upload"
     var bodyReader = request.getBodyReader()
     if bodyReader.isErr():
-      return RestApiResponse.error(Http500)
+      return RestApiResponse.error(Http500, msg = bodyReader.error())
 
     # Attempt to handle `Expect` header
     # some clients (curl), wait 1000ms
@@ -190,10 +190,13 @@ proc initDataApi(node: CodexNodeRef, repoStore: RepoStore, router: var RestRoute
     var mimetype = request.headers.getString(ContentTypeHeader).some
 
     if mimetype.get() != "":
+      let mimetypeVal = mimetype.get()
       var m = newMimetypes()
-      let extension = m.getExt(mimetype.get(), "")
+      let extension = m.getExt(mimetypeVal, "")
       if extension == "":
-        return RestApiResponse.error(Http422, "The MIME type is not valid.")
+        return RestApiResponse.error(
+          Http422, "The MIME type '" & mimetypeVal & "' is not valid."
+        )
     else:
       mimetype = string.none
 
@@ -231,9 +234,6 @@ proc initDataApi(node: CodexNodeRef, repoStore: RepoStore, router: var RestRoute
     finally:
       await reader.closeWait()
 
-    trace "Something went wrong error"
-    return RestApiResponse.error(Http500)
-
   router.api(MethodGet, "/api/codex/v1/data") do() -> RestApiResponse:
     let json = await formatManifestBlocks(node)
     return RestApiResponse.response($json, contentType = "application/json")
diff --git a/tests/integration/testrestapi.nim b/tests/integration/testrestapi.nim
index 52b722d6..f1f2299f 100644
--- a/tests/integration/testrestapi.nim
+++ b/tests/integration/testrestapi.nim
@@ -200,7 +200,7 @@ twonodessuite "REST API":
     let response = client1.uploadRaw("some file contents", headers)
 
     check response.status == "422 Unprocessable Entity"
-    check response.body == "The MIME type is not valid."
+    check response.body == "The MIME type 'hello/world' is not valid."
 
   test "node retrieve the metadata", twoNodesConfig:
     let headers = newHttpHeaders(