Can not select notifications , can not allow notifications to the devices.
Mysql works fine as a Traccar database so we need specific details of your issue in order to help you resolve it.
Thanks Richard for answer,
I find a file witch problems. in a moment i open app.min.js and put one 'n' in one place and this cause my problem y replace the 'n' and it start working good.
That doesn't sound like anything to do with mysql so, sorry, can't help you.
I change my h2 Database to Mysql Database , But now i create some notifications but can not select none of them to any device with any user. Can some one help me?