Most app problems can be resolved without changing your account.
Try these steps in order
Check that your internet connection works in another app
Close Vibebo completely and open it again
Install the latest Vibebo update from your app store
Restart your phone
Check that your phone has enough free storage
Sign out and sign in again only when you know your password and can access your email
Reinstall the app as a final step
Before reinstalling, confirm that your messages and account are connected to your Vibebo login. If the problem continues, contact support with the exact error, the action that caused it and the steps you already tried.