When I install  social share tag plugin in our website then  fattal error arrive, I attach a photo you can check this error

usually means some file is not enclosed or that there is some extra space in index.php or functions.php

 I send both screenshot can u check this when i send somebody our listing data were not fetch before work it

You can use online rich data preview and check if OG tags are populated and are as expected

i check in online rich preview but it not working, but when i send post link in fb it fetch the data but then i send same post in whatsapp it not working.

I tested rich result preview and it shows no items detected.

what is your URL?
You can enable Osclass to generate structured data.

I can't install plugin when i install plugin in ossclass theme then they show fatal error.

Who is talking about plugin?