ORA-00257: Archiver error. Connect AS SYSDBA only until resolved

Please can help with possible solution to the problem. I used the below script after few days the error happened again.

run {

crosscheck archivelog all;

crosscheck backup;

delete noprompt obsolete;

delete noprompt expired archivelog all;

delete noprompt expired backup;

}

delete noprompt archivelog until time "sysdate-.25";

Below is my db_recovery_file_dest_size

     big integer 100G.