ORA-00928: missing SELECT keyword on script that ran in version 11.5, fails in 12.5.x (4270200)

Running  the same script in version 12.5 generates the error,  ORA-00928: missing SELECT keyword

select chr(10) || ' Host_Name: ' || host_name from v$instance
union all
select ' DB_Instance: ' || rpad(name,10) || 'DBID: ' || dbid
from v$database
union all 
union all
select ' Oracle_Version: ' || version || chr(10) || chr(10) from v$instance
*
Error at line 6
ORA-00928: missing SELECT keyword

This script ran properly in version 11.5 and 11.6