I use a Windows application called WinSCP to connect to Linux devices like the Ezlo hub, its like Windows explorer. You can more easily manage and delete / create files and folders for example.
Regarding the Dashboard try deleting your browsers cache and data.
Your using Chrome browser ?
You might have to delete the local DB for the Ezlo dashboard, that will definitely fix it.
https://community.ezlo.com/t/updates-for-ezlogic-1-27-1-ezlo-hubs-only/219705/5?u=cw-kid