How to update theme

Hi smsasikala
You can choose this way
Step 1: Backup your site( Include codes + Database)
Step 2: From the dashboard>>Appearance>>Theme, you need to activate the default template( Ex; Twenty Seventeen theme)
Step 3: Click on Dukamarket and then click Delete( look down in the right). NOTE: DO NOT delete the Dukamarket Child theme
Step 4: Return the dashboard choose Plugins then deactive the Ovic Adon Toolkit, Slider Revolution, Elementor( or WPBakery Page Builder) and delete them.
Step 5: Return the Appearance menus choose Theme>>Add New>>choose your latest theme version>>Install
Step 6: Return the Plugins menus>>New>>and choose the Ovic Adon Toolkit (Slider Revolution, Elementor or WPBakery Page Builder plugins are the same)>>Install>>and activate them.
Please do it and let me know.
Regards,
Maason

Hi smsasikala
How's your site? I found your review on themeforest. The cause maybe by plugins or your host also. Can you provide wp-admin + Cpanel accounts again via secret information area? I would like to check and help you. Hope your issue will be solved.
Waiting your reply..
Have a nice day!
Regards,
Maason