I have Hotel website, naturevilas.com, after updating a PHP version code there is undefined error occur automatic, I don't know why this error occur and I have a big problem because this error can effect my business. I am also going software company in my local area but still I am facing a problem. I don't know how to solve this problem. Error on My Website showing in Font Screen: Bolt Error Back to merchant
website link: naturevilas.com
Home Page
Room Page
Select a Room
CheckOut Page
Error Page
What I have tried:
I have tried, update my PHP Code or back to old version of PHP Code(Backup file) and Connect with my local area software company, but still facing a problem.