Zoho email app on Android not working

Zoho email app on Android not working

I have been using zoho email for 5 years. I use it on Google pixel 7PRO and OnePlus 12. For last 3 days it is not syncing, hanging all the time. I have disisnalled and re installed it, but change. I can see the pop up message, but when I open the app, the email doesn't sync for a LONG TIME. And sent items folder takes even longer.