Hello,
We face the following error on your site from time to time https://gyazo.com/abd3abd5f9fa5ee3152abad17baedbbf
Contact your hosting support to fix the mentioned issue and also ask to reduce the server response time.
Also, contact Dokan plugin support to fix the following error https://gyazo.com/2ef488681d674aa9bfdbe4c01957afc2
We checked theme settings and set all the possible optimization options from our side. We don’t have more tools to speed up the theme. So, everything you can do is the optimization of the server side.
We are ready to give a refund if you are not satisfied with the theme speed.
Regards