Debug errors

some errors that appear on debug.log:

[06-Feb-2014 10:10:45 UTC] PHP Notice:  Undefined index: title in /home/content/59/10137759/html/cockhero/www/wp-content/plugins/nice-login-register-widget/pw-login-widget.php on line 238
[06-Feb-2014 10:10:45 UTC] PHP Notice:  Undefined index: title_only_loggedout in /home/content/59/10137759/html/cockhero/www/wp-content/plugins/nice-login-register-widget/pw-login-widget.php on line 240
[06-Feb-2014 10:10:45 UTC] PHP Notice:  Undefined variable: login_form in /home/content/59/10137759/html/cockhero/www/wp-content/plugins/nice-login-register-widget/pw-login-widget.php on line 257
[06-Feb-2014 10:10:45 UTC] PHP Notice:  Undefined variable: register_form in /home/content/59/10137759/html/cockhero/www/wp-content/plugins/nice-login-register-widget/pw-login-widget.php on line 258
[06-Feb-2014 10:10:45 UTC] PHP Notice:  Undefined variable: horizontal in /home/content/59/10137759/html/cockhero/www/wp-content/plugins/nice-login-register-widget/pw-login-widget.php on line 264
[06-Feb-2014 10:10:45 UTC] PHP Notice:  Undefined variable: checked in /home/content/59/10137759/html/cockhero/www/wp-content/plugins/nice-login-register-widget/pw-login-widget.php on line 268
[06-Feb-2014 10:10:45 UTC] PHP Notice:  Undefined index: remember_me_def in /home/content/59/10137759/html/cockhero/www/wp-content/plugins/nice-login-register-widget/pw-login-widget.php on line 271
[06-Feb-2014 10:10:45 UTC] PHP Notice:  Undefined index: remember_me_def in /home/content/59/10137759/html/cockhero/www/wp-content/plugins/nice-login-register-widget/pw-login-widget.php on line 272
[06-Feb-2014 10:10:45 UTC] PHP Notice:  Undefined variable: border in /home/content/59/10137759/html/cockhero/www/wp-content/plugins/nice-login-register-widget/pw-login-widget.php on line 281
[06-Feb-2014 10:10:45 UTC] PHP Notice:  Undefined variable: logged_in_text in /home/content/59/10137759/html/cockhero/www/wp-content/plugins/nice-login-register-widget/pw-login-widget.php on line 296

[Moderator Note: Please post log files between backticks or use the code button.]

https://wordpress.org/plugins/nice-login-register-widget/