The below errors were faced while trying to edit layers (feature classes):

Could not load data from the data source.If you can correct the problem, press the refresh button to reload data.Possible problems can include bad network connection, invalid field,etc.
Underlying DBMS error [Error executing stored procedure <schema>.logfile_util.logfile_pool_get_id::ORA-01403: no data found]

underlying DBMS error[ORA-01536:space quota exceeded for tablespace ‘TS_SDE_LOG_DATA_01’

have been fixed by changing the parameter “maxblobsize” under “SERVER_CONFIG” table in SDE schema.

The command to use:

sdeconfig -o alter -u sde -v maxblobsize=5000000 -i XXXX -s XX

XXXX: sde port number
XX: your server name (hosting your SDE)