Describe the bug
The Co-author map feature on Scholia (including the QLever-backed instance) has stopped functioning. Instead of displaying the map, the interface reports that the query yielded no results.

To Reproduce
Steps to reproduce the behaviour:

• Go to https://scholia-qlever.toolforge.org/author/Q18618629#coauthor-map
• See error: «This query yielded no results. You can still try to find something by modifying it.»

Expected behaviour
An interactive map displaying the geographical distribution and connections of co-authors for the specified researcher.

Screenshots
N/A

Desktop (please complete the following information):

• OS: Windows 11 Home
• Browser: Firefox
• Version: 149.0 (64 bit)

Smartphone (please complete the following information):
N/A

Additional context
N/A