Increasing the errors in error_log

hi
after i update this plugin, I got several Error in error log
error:

[05-May-2019 06:16:48 UTC] PHP Warning: join(): Invalid arguments passed in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 63
[05-May-2019 06:16:48 UTC] PHP Warning: array_map(): Argument #2 should be an array in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 57
[05-May-2019 06:16:48 UTC] PHP Warning: array_filter() expects parameter 1 to be array, null given in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 61
[05-May-2019 06:16:48 UTC] PHP Warning: join(): Invalid arguments passed in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 63
[05-May-2019 06:16:48 UTC] PHP Warning: array_map(): Argument #2 should be an array in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 57
[05-May-2019 06:16:48 UTC] PHP Warning: array_filter() expects parameter 1 to be array, null given in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 61
[05-May-2019 06:16:48 UTC] PHP Warning: join(): Invalid arguments passed in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 63
[05-May-2019 06:16:48 UTC] PHP Warning: array_map(): Argument #2 should be an array in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 57
[05-May-2019 06:16:48 UTC] PHP Warning: array_filter() expects parameter 1 to be array, null given in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 61
[05-May-2019 06:16:48 UTC] PHP Warning: join(): Invalid arguments passed in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 63
[05-May-2019 06:16:48 UTC] PHP Warning: array_map(): Argument #2 should be an array in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 57
[05-May-2019 06:16:48 UTC] PHP Warning: array_filter() expects parameter 1 to be array, null given in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 61
[05-May-2019 06:16:48 UTC] PHP Warning: join(): Invalid arguments passed in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 63
[05-May-2019 06:16:48 UTC] PHP Warning: array_map(): Argument #2 should be an array in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 57
[05-May-2019 06:16:48 UTC] PHP Warning: array_filter() expects parameter 1 to be array, null given in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 61
[05-May-2019 06:16:48 UTC] PHP Warning: join(): Invalid arguments passed in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 63
[05-May-2019 06:16:48 UTC] PHP Warning: array_map(): Argument #2 should be an array in /home/konkur/public_html/wp-content/plugins/seo-automated-link-building/src/Link.php on line 57

And when I went to the plugin setting page, I realized that some of the links I had created were removed.
please see the below image:
https://s9.picofile.com/file/8359464050/Capture.PNG
https://s9.picofile.com/file/8359464142/12xxx.PNG

how to solve this problem?

Please send the download link of the older version of this plugin to me.