The email settings in the wasp.cfg of the ump for the report scheduler had been removed.
UIM 8.x, 9.x 20.x
After analyzing the error and source code, it looks like the problem is with the email_from_address property value in wasp.cfg.
This property will be available in the section of wasp.cfg.
If it is blank, ask them to reconfigure "Configure email server" section in Report Scheduler UI and recheck all the values in the section of wasp.cfg.
from the wasp.cfg
reloadable = true
cross_context = true
load_on_startup = true
unpack_war = true
file_store_root = webapps/reportscheduler/archive
path = /reportscheduler
the email setup is missing.
Please follow the documentation to set this backup.