Header Image Dissappear and save all the editings

I use WordPress 5.1.1 and i install Alizee theme

1- The Header image dissappear often
2- When I crop the image it saves all the tries in the server that mrans a lot of different size of same image
3- I upgrade the theme and i got this error
PHP Warning: call_user_func_array() expects parameter 1 to be a valid callback, function ‘update’ not found or invalid function name in sitename/wp-includes/class-wp-hook.php on line 286

How i can solve these all problems

Thank you


Please create a separate topic for each of your issues to keep the forum in good order and make it easier to help you. Hope for your understanding.

Kind Regards, Roman.
aThemes Support

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