DB Errors on Activation

I just installed this plugin and when I activated it I received these errors (I replaced the DB name with DB and the username with USER):

Plugin could not be activated because it triggered a fatal error.

WordPress database error: [Table 'DB.wp_mailster_users' doesn't exist]
SHOW FULL COLUMNS FROM wp_mailster_users WHERE 1=1

WordPress database error: [Table 'DB.wp_mailster_users' doesn't exist]
SHOW FULL COLUMNS FROM wp_mailster_users WHERE 1=1

WordPress database error: [Table 'DB.wp_mailster_users' doesn't exist]
SHOW FULL COLUMNS FROM wp_mailster_users WHERE 1=1

Warning: fopen(/home/USER/public_html/blog/wp-content/plugins/wp-mailster/log/mailster.log.php): failed to open stream: Permission denied in /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php on line 296 Warning: fwrite() expects parameter 1 to be resource, boolean given in /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php on line 297 Fatal error: Uncaught exception 'RuntimeException' with message 'Cannot write to log file /home/USER/public_html/blog/wp-content/plugins/wp-mailster/log/mailster.log.php' in /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php:298 Stack trace: #0 /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php(38): MstLog::initFile() #1 /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php(116): MstLog::log('checkAndFixDBCo...', 'ERRO', 1) #2 /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/utils/DBUtils.php(489): MstLog::error('checkAndFixDBCo...', 1) #3 /home/USER/public_html/blog/wp-content/plugins/wp-mailster/admin/mst_config.php(18): MstDBUtils->checkAndFixDBCollations() #4 [internal function]: mailster_install('') #5 /home/USER/public_html/blog/wp-includes/class-wp-hook.php(298): call_user_func_array('mailster_instal...', Array) #6 /home/USER/public_html/blog/wp-includes/class-wp-hook.php(323): WP_Hook->app in /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php on line 298 Warning: fopen(/home/USER/public_html/blog/wp-content/plugins/wp-mailster/log/mailster.log.php): failed to open stream: Permission denied in /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php on line 296 Warning: fwrite() expects parameter 1 to be resource, boolean given in /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php on line 297 Fatal error: Uncaught exception 'RuntimeException' with message 'Cannot write to log file /home/USER/public_html/blog/wp-content/plugins/wp-mailster/log/mailster.log.php' in /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php:298 Stack trace: #0 /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php(38): MstLog::initFile() #1 /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php(120): MstLog::log('--- --- --- ---...', 'DEBU', 2) #2 /home/USER/public_html/blog/wp-content/plugins/wp-mailster/models/plgSystemMailster.php(63): MstLog::debug('--- --- --- ---...', 2) #3 /home/USER/public_html/blog/wp-content/plugins/wp-mailster/wp-mailster.php(1542): plgSystemMailster->onAfterInitialise() #4 [internal function]: mst_execute_procedures('') #5 /home/USER/public_html/blog/wp-includes/class-wp-hook.php(298): call_user_func_array('mst_execute_pro...', Array) #6 /home/USER/public_html/blog/wp-includes/class-wp-hook.php(323): WP_Hook in /home/USER/public_html/blog/wp-content/plugins/wp-mailster/mailster/app/Log.php on line 298