Try changing to the default theme and see if the problem persists. If the problem goes away then it is definitely being caused by the theme. At that point your choices are to find a new theme that works or diagnose and fix the problem with the theme. In some cases the theme may just need to be updated to the latest version.
This forum is a great source of help but you have to be clear on what the problem is. The fewer details you give, the harder it is for anyone to respond. Everybody who answers questions here is a volunteer doing so on their own time, so it’s best to make it easy for them to help.