Filter search results by clicking on chart element for links with no params throws error

[jorgeltd]

Describe the bug
DSpace version: 2023.02.04 and 2023.02.05
Tested on: Chrome, Opera

The functionality to filter a search result that includes a chart (pie, bar) by clicking on an element of the chart does not work if the route of the search result page does not include URL parameters.

When clicking an element of the chart, the console returns an error for trying to split the current URL string by the character "?"

To Reproduce
Steps to reproduce the behavior:

1. Go to a search result page that includes a chart and no params in the URL, for example, the profile of a researcher https://dspacecris-demo.4science.cloud/entities/person/andreabollini.
2. Open the browser console.
3. Click on an element of any available chart, for example "research article" on the pie chart.
4. Error will be logged in the console.
5. Go to a search result page that includes a chart and filter params in the URL, for example, the profile of a researcher with a date range filter applied https://dspacecris-demo.4science.cloud/entities/person/andreabollini?f.dateIssued.min=1951.
6. Click on an element of any available chart, for example "research article" on the pie chart.
7. Current search result will be filtered to items with the "research article" dc.type.

Expected behavior
When clicking on the chart element, the current search results should be filtered using the value of the metadata from the chart, regardless of whether the search result page contains URL parameters or not.

Related work
None found