Whenever I click to save changes the changes are not getting saved. Plus the nav tab navigation is not working, It is not switching into the vp_current content.
Details about the use :
Problem Page: https://toolsmetric.com/wp-admin/admin.php?page=vpt_option
OS : Ubuntu 16.04
Browser : Chromium Version 85.0.4183.121
From the attachment, you can see that it is not switching tabs even though I clicked it.
http://rehubdocs.wpsoul.com/docs/rehub-theme/for-developers/wordpress-5-5/