这应该可以通过 https://github.com/discourse/discourse/commit/7d9b98a1614c48905df129b8691a07a834fa12f7 修复
并且在稳定分支上 FIX: Allow Time objects to be deserialized in PostRevision (stable) (… · discourse/discourse@5d2ecce · GitHub
要更新标准安装，请访问 /admin/upgrade
/admin/upgrade