If you have optimizepress and you are trying to save the work in live editor, however when you click save and close. The spinning wheel just keep spinning and doesn’t do anything, it means that your server is having problem processing the data. What you need to go is increase the max_input_vars.
Please contact your server administrator to increase it. Generally the setting should be:
Increase max_input_vars for optimizepress to process data
That is what I input to make my optimizepress to work.