PHP script expert wanted to solve a WEBSITE error 3

PLEASE NOTE: The only thing I want to see in your bid, is your correct answer to my questions. If your answer proves that you may know what is wrong and may be able to help, then, I'd contact you to give you more information, before I award the project to you. Without an answer to the questions, I wont chat with you. If you include any information about yourself beside the answer to the questions asked, I'd pass over your bid, bc I don't have time to read all that. TAKE NOTE. CAN YOU SOLVE THIS PHP SCRIPT PROBLEM? My B2B website has an admin [login to view URL] admin panel does not load completely. When you log into the admin panel using username and password, it shows a blank page. And part of the front end website is now showing blank page. Another programmer was only able to restore the old backup files to make the site visible again. The old backup site which is online now, does not contain the updated changes already done on the website as well as over 15,000 registered users data on the site. But I want my updated website with the updated users content to be restored back online and any error in the script that made it to show blank pages to be resolved. Can you solve this issue? If so, I'd like you to answer the questions below: 1. What do you understand could have been wrong why this issue of blank page showed when I tried to access the website or admin panel? 2. How quickly can you solve it? I'd not give you access to my website panels to check for any error, if I don't get the feeling of certainty that you know what you are doing. Your answer is the only way for me to gauge whether you know what you are talking about or not. So, respond to the above questions accurately.