Schedule Trigger: Radio button for selecting the week of every month under Days per month option(in *Schedule editor*) is greyed out

Issue Summary

While adding Schedule Trigger from the Triggers tab from the plan configuration: The radio button for selecting the week of every month under the Days per month option(in Schedule editor) is greyed out.

This is reproducible on Data Center: (yes)

Steps to Reproduce

1. Goto plan configuration of any one of the plans from Actions > Configure plan option.
2. Goto Triggers tab.
3. Click on Add Trigger > Select Scheduled.
4. Click edit icon under Schedule option.
5. Select Days per month
6. The radio button for selecting the week of every month is disabled.

Expected Results

The radio button for selecting the week of every month should be in the Enabled state and be available for the screenreader to select the week to schedule the trigger.

Actual Results

The radio button for selecting the week of every month is disabled.

Please find attached screenshots for reference.

Workaround

Use a cron expression provided on the last tab of the Schedule editor.

For example, the following Quartz Cron entry will run the trigger every first Monday of the month at 10 a.m.:

0 0 10 ? * MON#1 *

And this will run the trigger at 1:30 p.m. on the last Wednesday of the month; useful if the month has 5 weeks.

0 30 13 ? * WEDL * 

More examples:

• Quartz Cron Trigger Tutorial