Several fatal errors

Hi there. I’m having issues configuring settings with this plugin. Everything is at the latest version, and I’m using a local development environment (Wampserver).

The errors appear when I access the settings page, and are:

Warning: Illegal string offset ‘selectinput’ in C:\wamp64\www\restofpath\wp-content\plugins\simple-csv-xls-exporter\settings.php on line 147

Warning: in_array() expects parameter 2 to be array, string given in C:\wamp64\www\…\wp-content\plugins\simple-csv-xls-exporter\settings.php on line 147

Thanks!
I tried deactivating and reactivating,