Mobile Friendly Test Failed

After enabling the lightspeed cache, Google Search Console it showed some errors such as “Mobile-Friendly Test” Failed.

I browsed to find its solution and find a solution for it that is to place / in UCSS URI Excludes

After trying this my problem fixed but this cause my site to reduce it overall speed

So help to fix this problem without adding / for UCSS URI Excludes.

Report number: ENCVSDHJ

The page I need help with: [log in to see the link]