https://www.balbooa.com/help/forums/gridbox/general/booking-error-500

I have the same error
https://www.balbooa.com/help/forums/gridbox/general/booking-error-500
I replaced the files as in the solution
Installing a new version Gridbox from a package, not as an update

https://studiof.pl/index.php/rezerwacja-2

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