Help me into solve Error in version 3.9 database Migration after Upgrade

I have upgraded plugin to 3.9 version yesterday and clicked migration process. it was stuck “Migrate queued items” showing in progress like its interupted or stuck. after that I followed solution provided on https://github.com/boonebgorges/buddypress-group-email-subscription/wiki/Migrating-to-3.9.0 this link.(the last one). I hit wp-admin/?bpges-force-migrate=queued_items including my website url. there was message showing “Migration Completed” but when I return to Plugin setting page, its showing “Migrate queued items” in progress. when I viewed the Queue there is list of activities shows for previous days in daily digest and weekly digest but most of section’s “to: ” section showing null value. so the user emails not setted for them.