Update Failed: Warning: failed to open stream: No such file or directory

I am getting the following error when I attempt to update this plugin
Update Failed: Warning: fopen(C:\inetpub\shop/wp-content/plugins/geoswitch/geoswitch.php): failed to open stream: No such file or directory in C:\inetpub\shop\wp-includes\functions.php on line 4848 Warning: fread() expects parameter 1 to be resource, boolean given in C:\inetpub\shop\wp-includes\functions.php on line 4851 Warning: fclose() expects parameter 1 to be resource, boolean given in C:\inetpub\shop\wp-includes\functions.php on line 4854 {"success":false,"data":{"update":"plugin","slug":"geoswitch","oldVersion":"","newVersion":"","plugin":"geoswitch\/geoswitch.php","pluginName":"","errorMessage":"Plugin update failed."}}

Has anyone experienced anything similar? The plugin appears to be working correctly – except that I am now no longer able to update it.

I am not an experienced php programmer (I am able to follow the code to some extent), I just run a self hosted on-line store that uses the plugin to determine what offers to show to people from different parts of the country.

Thanks.