Oracle 12cR1 - RMAN-11003, ORA-00354, ORA-00353 - Corrupt Redo Log
That is not an online redo log. That is an archived redo log of thread 2 sequence 61264. It can be clearly seen from the error and the name of the file. The archivelog on disk was damaged. Restore it from backup and continue recovery using that.
If you do not have a backup of that archivelog, just roll forward the standby database with an incremental backup.
As a last resort, you can rebuild the standby database from the primary.