When attempting to add content to a List you get the following error "Exception from HRESULT: 0x80040E14".

Check the SharePoint log files for the following error.
{datetime} OWSTIMER.EXE (0x05B8) 0x0934 Windows SharePoint Services Database 6f8g Unexpected Unexpected query execution failure, error code 9002. Additional error information from SQL Server is included below. "The transaction log for database 'SharePoint_Config_xxx' is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases" Query text (if available): "{?=call proc_StartTimerRunningJob(?,?,?,?,?,?)}"

As the error states, the Transaction Log database is full or there is insufficient disk space. Trimming this DB or allocating more disk will should resolve the “Exception from HRESULT: 0x80040E14” error. You should not need to restart – it should just come good.

You need to clear some space in Sql Server drive.