WordPress database errors in php5.6 error log

Installed plugin & have the following php errors:

On initial install:
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[14-Sep-2015 23:24:02 UTC] WordPress database error Table ‘5aZy8J3nef.fold_wp_xxxredirect_it’ doesn’t exist for query SHOW COLUMNS FROM fold_wp_xxxredirect_it made by activate_plugin, include_once(‘/plugins/cleverwise-redirect-it/index.php’), QM_DB->query

[14-Sep-2015 23:24:02 UTC] WordPress database error Table ‘5aZy8J3nef.fold_wp_xxxredirect_it’ doesn’t exist for query alter table fold_wp_xxxredirect_it ADD ri_link_aliases TEXT NOT NULL made by activate_plugin, include_once(‘/plugins/cleverwise-redirect-it/index.php’), QM_DB->query

Are these 1st two errors due to my prefix fold_wp?

On rebuild redirect process:
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[14-Sep-2015 23:46:54 UTC] PHP Warning: Division by zero in /srv/users/serverpilot/apps/shop/public/wp-content/plugins/cleverwise-redirect-it/ria.php on line 478

[14-Sep-2015 23:46:54 UTC] WordPress database error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ” at line 1 for query SELECT ri_link_id,ri_link_name FROM fold_wp_1Sa9y5redirect_it where (ri_link_name like “%feeds%” or ri_link_url like “%feeds%” or ri_link_notes like “%feeds%” or ri_link_aliases like “%feeds%”) order by ri_link_name limit 0, made by do_action(‘toplevel_page_cw-redirect-it’), call_user_func_array, cw_redirect_it_aside, QM_DB->query

After clicking Build Redirect File permissions problems are displayed.

redirectit.php is located in

/srv/users/serverpilot/apps/shop/public/redirectit.php

with permissions 777. I guess this relates to incorrect install because of database errors above.

Thanks in advance,

https://www.ads-software.com/plugins/cleverwise-redirect-it/