FRM-40734: internal error: PL/SQL error occurred
Error occurs when the user clicks to bring up file browser window to select HMDIF file to pre-process in any of the pre-processors.
Check values of user options REPCLIPATH and REPOUTPATH. They should point to the reports output location on the application server, as the application server sees it.
https://communities.bentley.com/products/assetwise/exor/w/wiki/11991/how-to-set-up-exor-listeners