Server error

Please see the attached screenshot showing the error message. This occurs when I select a device and click “Save.” I just imported a total of 645 devices.

Also, does filtering happen on this page? For example, after selecting a Device Type like “Audio Device,” should only the related Brands and Models appear below?

After importing the new devices, the service options on the booking page appear completely messed up. Please help.

You are trying to post 1502 while server allow_max_vars 1000

I have increased it to 5000 now it should be okay! 

It was to do through cPanel

Going to cPAnel > MultiPHP INI Editor >
max_input_vars

This sets the maximum number of input variables allowed per request and can be used to deter denial of service attacks involving hash collisions on the input variable names. 

It's increased to 5000