Error in Photty Theme while Clicking on Image (To make it full screen)

i’ve downloaded the Photography Photty theme from envato elements (Freebies). But now it is giving me problems. If i click on any photo on my website then it does nothing just show a transparent overlay over the page. After closing that overlay, if i click in the website anywhere it opens again. Eventually i have to close the tab and again open it if i have to click on the link.
please suggest some solutions.
PS: It was working fine earlier. i am facing this issue from past 2 months. and i have also installed the previous wordpress versions back to 5.5.3 it does the same thing.

It’s probably theme/WordPress ( latest version ) issue. Contact the theme author for the free support

I got the theme in Envato freebies so technically I can’t contact without a purchase code. Also, I’ve tried the older version as well now. it’s not working

I can offer paid support or you need to purchase the theme from the author to get the support. In any case, you will have to spend some money as this is not really helping, it’s a job.

how much you’ll charge?