Details: Unable to load required resources for column 'standalone-server-column': {"status":500,"name":"indexed_db_went_bad","message":"unknown","reason":"QuotaExceededError"}
What is it? Nothing in the server.log about this issue, nor in the web nor in the documentation...
Did you try if your problem persists when you clear your browser cache? (What does "Quota Exceeded Error" mean? – Zencastr)