Did you save the export_config.json file from 3.5.51? If you save it from a newer version of Spine, 3.5.51 may not be able to read it.
你是否保存了3.5.51中的export_config.json文件？如果你从较新版本的Spine中保存，3.5.51可能无法读取它。
I wonder if this is a bug in 3.5.51? That version is quite old. Any chance you can use Spine 3.8?
我想知道这是不是3.5.51中的一个BUG？那个版本已经很老了。你能不能用Spine 3.8？
