On sites that previously had the 2.0 release of Marketo MA installed, the administration panel at /admin/config/services/marketo-ma/users/activities will produce a white screen error with an "incomplete object" error outputted to the system PHP log. This only happens if the site has a previously stored state for 'marketo_ma_user.activity_types' which are outputted on this page.
There appears to be an incompatibility between the schema of the old saved state and what is expected by processes calling getMarketoActivities() from the MarketoMaUserService class. This error does not happen on fresh installs.
Add an update script to Marketo MA User to purge saved states for 'marketo_ma_user.activity_types'. If a saved state isn't found when MarketoMaUserService::getMarketoActivities() is called a fresh valid copy will be generated and saved. The keys for the data in the newly saved state will match those of the old state so previously selected activities will be retained and are still correct.
I'll submit a merge request with an update script to purge the offending saved state.
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