Merge branch 'master' of https://github.com/browngraphicslab/Dash-Web

1 files changed, 2 insertions, 2 deletions

diff --git a/src/client/DocServer.ts b/src/client/DocServer.ts
index 12fed3e46..d793b56af 100644
--- a/src/client/DocServer.ts
+++ b/src/client/DocServer.ts
@@ -272,7 +272,7 @@ export namespace DocServer {
             const fieldMap: { [id: string]: RefField } = {};
             const proms: Promise<void>[] = [];
             for (const field of fields) {
-                if (field !== undefined) {
+                if (field !== undefined && field !== null) {
                     // deserialize
                     const prom = SerializationHelper.Deserialize(field).then(deserialized => {
                         fieldMap[field.id] = deserialized;
@@ -439,4 +439,4 @@ export namespace DocServer {
     function respondToDelete(ids: string | string[]) {
         _respondToDelete(ids);
     }
-}
\ No newline at end of file
+}