There seem to be some connection issues with the default node (@Aion-Dipesh).
In the meantime, if you check you balance on mainnet.aion.network it should reflect your actual balance so you know your funds are safe.
If you need to manage them, and the desktop wallet app isn’t working for you, you have 2 options:
If you’re using a Ledger, you can use app.magnumwallet.co and import the account through their interface.
If not, you should still be able to export the keystore file (unlock the wallet in the desktop app, then click the right-most icon next to the address you wish to export–should look like a box with an arrow coming out of it). Select where you’d like to save the export file and enter an encryption password. You can then import this file with AIWA (getAIWA.com ).