I am trying to upload a template and in the final step in my installation the following message appears

Cookies appear to be disabled in your browser. You will not be able to install the application with this setting turned off. Alternatively, there may be a problem with your server session.save_path. In this case, please consult your hosting provider if you do not know how to check or correct this problem. Incorrect table definition; there can be only one auto column and it must be defined as a key Index column size too large. The maximum column size is 767 bytes.