There's 2 issue here.

Office 3.0.1 give me this error;
Call to a member function html() on null

No error if using Protostar default.

Also there is a notification for update to ES 3.0.2, but click an update button all giving an error;
Error updating component when using the API from Joomla. Please try again.

This is a fresh install of;

Joomla 3.9.2
Office template 3.0.1
ES 3.0.1


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