Fixed a missing await when throwing server side errors

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

plugins/scaffolder/src/api.ts

@@ -187,7 +187,7 @@ export class ScaffolderClient implements ScaffolderApi {
     });
 
     if (!response.ok) {
-      throw ResponseError.fromResponse(response);
+      throw await ResponseError.fromResponse(response);
     }
 
     return await response.json();
@@ -302,7 +302,7 @@ export class ScaffolderClient implements ScaffolderApi {
     });
 
     if (!response.ok) {
-      throw ResponseError.fromResponse(response);
+      throw await ResponseError.fromResponse(response);
     }
 
     return await response.json();