We have released cylc-flow 8.5.1
At 8.5.0, we introduced validation for the mail events and handler events configurations. Workflows would fail validation if invalid events were detected.
Quite a few workflows hit this error, so to avoid issues, 8.5.1 has demoted this validation error into a validation warning.
For context, see: How to unset mail events in Cylc 8.5 - #5 by erin-raif
How to update site installations
Sites should create a new environment for this release and manage parallel installations using the provided wrapper script .
How to update stand-alone installations
# First shut down running workflows:
cylc stop '*'
# For Conda managed environments:
conda install 'cylc-flow=8.4.4'
# For Pip managed environments:
pip install 'cylc-flow==8.4.4'