Line Chart Block Object Reference Error when used with Page Context Setting

[KennySnow-BEMA]

Description

Using a Line Chart Block in v16.4 with the Page Context setting causes an Object Reference error preventing access to the page until the block is removed.

Actual Behavior

Using a Line Chart Block in v16.4 with the Page Context setting causes an Object Reference error preventing access to the page until the block is removed.

Error produced:

Error Object Reference not set to an instance of an object.

at Rock.Web.UI.RockPage.GetCurrentContext(EntityTypeCache entity, Dictionary`2 keyEntityDictionary) in \Rock\Web\UI\RockPage.cs:line 3116
   at Rock.Reporting.Dashboard.MetricChartDashboardWidget.GetPrimaryMetricPartitionEntityIdFromContext() in \Rock\Reporting\Dashboard\MetricChartDashboardWidget.cs:line 634
   at Rock.Reporting.Dashboard.MetricChartDashboardWidget.GetSelectedPartitionEntityIdentifiers() in \Rock\Reporting\Dashboard\MetricChartDashboardWidget.cs:line 555
   at RockWeb.Blocks.Reporting.Dashboard.LineChartDashboardWidget.OnLoadChart()
   at Rock.Reporting.Dashboard.MetricChartDashboardWidget.LoadChart() in \Rock\Reporting\Dashboard\MetricChartDashboardWidget.cs:line 769
   at Rock.Reporting.Dashboard.MetricChartDashboardWidget.OnLoad(EventArgs e) in \Rock\Reporting\Dashboard\MetricChartDashboardWidget.cs:line 182
   at Rock.Web.RockControlAdapter.OnLoad(EventArgs e) in \Rock\Web\RockControlAdapter.cs:line 71
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Expected Behavior

Either a generated chart or an error that page context is required for the block to function correctly.

Steps to Reproduce

On v16.4:

1. On a page add a Line Chart block
2. Select a metric
3. Select "Get from page context"
4. Save

Issue Confirmation

• [X] Perform a search on the Github Issues to see if your bug or enhancement is already reported.
• [X] Try to reproduce the problem on a fresh install or on the demo site.

Rock Version

16.4

Client Culture Setting

en-Us

[KennySnow-BEMA]

The workaround for this appears to be to select "Select Partition(s)" and "Combine Multiple Values". If "Combine Multiple Values" is unchecked the block will report that it has no data.