Your Zoho CRM migration has been paused because of the API limits exceeding. According to your Zoho edition, you have restricted number of API requests per day and organization. That is why Data2CRM puts on hold your Zoho CRM data migration till the API requests is updated. When a number of API requests is restocked, Data2CRM will carry on the migration process at once automatedly.
To find out your Zoho API request usage visit this page.