Module is incompatible with newer version of phpspreadsheet.
- Root composer.json requires drupal/views_data_export_phpspreadsheet 2.0.1 -> satisfiable by drupal/views_data_export_phpspreadsheet[2.0.1].
- drupal/views_data_export_phpspreadsheet 2.0.1 requires phpoffice/phpspreadsheet ~1 -> found phpoffice/phpspreadsheet[1.0.0, ..., 1.29.0] but it conflicts with your root composer.json require (^2.0).
Install "Data export phpspreadsheet" module with composer and installed phpoffice/phpspreadsheet which ends up on 2.0 version.
Using version ^2.0 for phpoffice/phpspreadsheet
Add support for 2.0 version?
Fixed
2.0
Code
version 2 was relased last month you can test with version 2. If it works well. I will update phpoffice/phpspreadsheet to version 2
Issue #3423122: Error during installation with phpspreadsheet 2.0...
Automatically closed - issue fixed for 2 weeks with no activity.