Try this (you need to use FTP to do this):
1. resetting plugin by renaming plugin folder (wp-content/plugins) by adding “-old” to the end of folder name
2. create new plugin folder called plugins
3. try to access your wordpress
4. re-installing plugin as necessary by download or move it from plugind-old folder one by one to the new plugin folder.
if your site still blank then you could try
5. download latest wordpress and copy all folder and files except wp-content folder and wp-config.php file and paste it into your server