Hello Sir,
We have resolved the issues. Please download the latest theme and plugin from Themeforest and update your site. Now, you can show or hide the header button and update the text or style using the theme customizer. I have shared the video on how to update the button style.
If you need any further help, please provide details and share your site credentials. Our support team will assist you as much as possible.
https://prnt.sc/k130blPa3ELX
https://vimeo.com/915550351/f27a3b7014
Best Regards,
Rubel Ahmed
WordPress Developer
BoomDevs