I followed the process and got an error related to the portfolio

Fatal error: Uncaught Error: Call to undefined function begin_cs_get_option()…../public_html/wp-content/plugins/designthemes-core-features/custom-post-types/dt-portfolio-post-type.php on line 64.

Then I cannot access my dashboard, I get interrupted with the following message:

We have successfully completed the installation of the items you selected. You may now proceed to your WordPress dashboard and start managing your site.

I am very lost on what my next step should be, I could not find any help for this error inside of the forum.