RE: SL 2018 CU1 - System Message 20202 when approving expense reports in TM.ERA.00 screen
John,
Thank you for posting this issue to the forum. This issue has been reported to MSFT support and BUG 39271 has been entered for our development team to address it. Please note with the currently workaround you are using to replace the TM.ERA.00 screen from SL 2018, the feature added under BUG 39062 - Expense Entry Review & Approval - Add Note Icon & Enable icons is removed.
Please note that starting with SL 2018, hot fixes are not being issues. Bugs and updates are rolled into the cumulative updates slated for quarterly release. We are still early in Q1 2019 so I hope this will be fixed with the next CU update for SL 2018.
Please let me know if you have any other questions!
Carolyn
MSDSL Technical Support