please go to theme folder, create php file with phpinfo() function inside and send us link to that file so we can have a look on your server settings. The problem is probably related with those limits but to be sure which one is the reason, we need that link. For more details about file creation, please visit https://mediatemple.net/community/products/dv/204643880/how-can-i-create-a-phpinfo.php-page
The value is 1000 in your phpinfo file, check it yourself. These changes may be done by the hosting provider some times. We cannot do anything here if they are unwilling to help. This is not set in stone, they just do not care.
Well, no thanks then. And remember not to tell anybody that your product doesn't work on some servers...or don't say a word and keep filling your piggy bank.
You are blaming us for your mega cheap hosting. There are thousands of topics on this forum with the same issue and everybody knows about this. It is not a secret, you are just not informed well enough.
We cannot really recommend any, basically make sure that the hosting you want to buy has options like max_input_vars, memory_limit editable and no suhosin script enabled. You have to understand that this theme has a lot of options for customization and it needs a bit better hosting in order to work properly.
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P.S. All details about what time and when we work, you can find on https://themeforest.net/user/muffingroup