Error on Chart page

Drupal: 6.19
Chart API: latest version

on

warning: array_filter() [function.array-filter]: The first argument should be an array in /home/mysite/public_html/sites/all/modules/betting/bettingstats/bettingstats.module on line 84. 
warning: Division by zero in /home/mysite/public_html/sites/all/modules/chart/chart.module on line 399. 
warning: Invalid argument supplied for foreach() in /home/mysite/public_html/includes/form.inc on line 1211

and

warning: Invalid argument supplied for foreach() in /home/mysite/public_html/sites/all/modules/betting/bettingstats/bettingstats.module on line 297. 
warning: Division by zero in /home/mysite/public_html/sites/all/modules/chart/chart.module on line 399. 
warning: implode() [function.implode]: Invalid arguments passed in /home/mysite/public_html/sites/all/modules/chart/chart.module on line 538. 
warning: implode() [function.implode]: Invalid arguments passed in /home/mysite/public_html/sites/all/modules/chart/chart.module on line 538. 
warning: implode() [function.implode]: Invalid arguments passed in /home/mysite/public_html/sites/all/modules/chart/chart.module on line 538. 
warning: implode() [function.implode]: Invalid arguments passed in /home/mysite/public_html/sites/all/modules/chart/chart.module on line 538. 
warning: implode() [function.implode]: Invalid arguments passed in /home/mysite/public_html/sites/all/modules/chart/chart.module on line 538