Hi Andrew ,
Thank you for your time and your suggestion .
I’ve already enabled WP_DEBUG and WP_DEBUG_LOG , WP_DEBUG_DISPLAY .
I can see the errors in a file that i wanted them to appear.
The interesting thing here is that there isn’t anything in the files and also in server error logs that suggests that there is a PHP error or else .
White screen problem , doesn’t appear always . It appears in 5 to 6 hours of interval . So every 5, 6 hours i need to check the website if its still there . If not i need to Flush the cache and it works again.
Any other suggestion ?
Thanks again …