Our property management just happens to have error on checkout. When press the button Preview, this error comes up.
money_format() expects parameter 2 to be double, string given
We have been using it and checking out with no changes to the system, but just now there is a problem. I cannot delete the room either to resolve the problem. I have updated all modules including the system, but it is still the same.
Any suggestions how to solve this problem will be great.