Having problem with the sync across devices for the long time

Having problem with the sync across devices for the long time

I use Zoho notebook both in windows laptop, website app and my android phone. Website app and phone are in sync but not
with laptop.
There are files that are not synced since 2 weeks
I dont even see `Sync now ` anywhere in the laptop app?
Please check and help me how can i resolve this issue?