I upgraded to Joomla 3.5.1 and my client contacted me that pages were totally blank. I checked and while the homepage is fine, wherever there was the module mod_matukio_map, I was getting the blank page. I set the error reporting to max and checked the offending pages again, and saw this message:

Fatal error: Call to undefined method CompojoomHtmlBehavior::bootstrap31() in /home/lurvsohk/public_html/modules/mod_matukio_map/tmpl/default.php on line 15

Any pages where this module was published, I was getting the blank screen. I unpublished the module mod_matukio_map, and the pages were working correctly again, but without the map feature. This is not a good solution since my client wants the maps to work. Please tell me how to make this site work again. I will turn it back on so you can see the error message, but not sure if that will tell you much.

Looking forward to hearing from you very soon.

Thanks!
Pat