fix null session

Author: jeff-zucker

dist/cjs/index.js

@@ -299,6 +299,7 @@ function () {
 
           case 7:
             session = _a;
+            session || (session = this.handlers.file.session);
             return [2
             /*return*/
             , session];

dist/esm/index.js

@@ -125,6 +125,7 @@ var SolidNodeClient = /** @class */ (function () {
                         _b.label = 7;
                     case 7:
                         session = _a;
+                        session || (session = this.handlers.file.session);
                         return [2 /*return*/, session];
                 }
             });