Support ? Impossible to re-sync a 4th time from Zoho CRM

Support ? Impossible to re-sync a 4th time from Zoho CRM

Hi, 
Impossible to re-synchronise a 4th time from Zoho CRM to Biging. I have tested and updated our Zoho CRM to avoid import problems. After 3 tries, the synchronization function is blocked and you have to ask to contact support. I have done this twice, but without any answer.
PS: I'm a Zoho One customer for my company.