diff --git a/caller.go b/caller.go
index fedc2f6..8d01ed7 100644
--- a/caller.go
+++ b/caller.go
@@ -110,6 +110,9 @@ func (c *Caller) WebInit(request *BaseRequest) (*WebInitResponse, error) {
 	if err := scanJson(resp.Body, &webInitResponse); err != nil {
 		return nil, err
 	}
+	if !webInitResponse.BaseResponse.Ok() {
+		return nil, webInitResponse.BaseResponse.Err()
+	}
 	return &webInitResponse, nil
 }