does not syncdoes not sync

Hello, I noticed today that my wallet is not syncing anymore, values ​​are being transferred to the Ergo postman but they are not showing up. And at the time of withdrawal, an exclamation mark appears as an error, what could it be? I’ve asked to sync and it still doesn’t work. Could you help me, please

Hello, which wallet would you be using and also how you came about to using this specific wallet?

Second question is just to understand better the issue as if this is the wallet I think you are using then hopefully we can help others.