Errors in debug log

Hi!

First of all, thanks for a great plugin. I think this is what I really need for my site. Though, I got a lot of errors in the debug log after installing the plugin. Even if I load a page not related to the plugin I get following errors:

[05-Sep-2015 09:41:39 UTC] PHP Notice: Undefined index: force_upgrade in /home/user/public_html/dev/wp-content/plugins/sp-client-document-manager/classes/install.php on line 7
[05-Sep-2015 09:41:39 UTC] PHP Notice: Undefined variable: alters in /home/user/public_html/dev/wp-content/plugins/sp-client-document-manager/classes/install.php on line 206
[05-Sep-2015 09:41:39 UTC] PHP Notice: Undefined index: cdm-f in /home/user/public_html/dev/wp-content/plugins/sp-client-document-manager/common.php on line 275
[05-Sep-2015 09:41:39 UTC] PHP Notice: Undefined index: sp-cdm-link in /home/user/public_html/dev/wp-content/plugins/sp-client-document-manager/common.php on line 301
[05-Sep-2015 09:41:39 UTC] PHP Notice: Undefined index: page in /home/user/public_html/dev/wp-content/plugins/sp-client-document-manager/shortcode.php on line 566
[05-Sep-2015 09:41:39 UTC] PHP Notice: Undefined index: dlg-delete-file in /home/user/public_html/dev/wp-content/plugins/sp-client-document-manager/shortcode.php on line 570
[05-Sep-2015 09:41:39 UTC] PHP Notice: Undefined index: sp-cdm-community-upload in /home/user/public_html/dev/wp-content/plugins/sp-client-document-manager/shortcode.php on line 579
[05-Sep-2015 09:41:39 UTC] PHP Notice: Undefined variable: html in /home/user/public_html/dev/wp-content/plugins/sp-client-document-manager/shortcode.php on line 691

Do you have any idea what is causing this?

Best Regards,
Hans Brolund

https://wordpress.org/plugins/sp-client-document-manager/