Hi @tijana91,
We appreciate your writing in,
Can you please try once disabling all the plugins on your site and check if it helps? Sometimes the issue might be caused due to a plugin conflict so you can start by disabling all the plugins within your site and then check. You can then enable them one by one to locate the one causing the issue.
If the provided solution doesn’t work for you please write us and we’ll get back to you.
With Regards,
ThemeGrill Support Team