{SEARCHKIT} exported file is corrupted
On different versions of CiviCRM but only for one instance I can export and download a file as .ods or .xls but I get the message that the file is corrupted and can't be opened both with LibreOffice and MSOffice and Numbers on Mac, Debian or Windows. But the .csv export is usable. Upgrading the core of the instance didn't change this behaviour.
Issue initially opened on [Export to excel] extension repo (extensions/civiexportexcel#18 (closed))