Single Custom Post type Not showing after PHP version update

I create a new post type called ‘bangla sms’ and ‘bangla love sms’ is a custom taxonomy. It was working fine but recently I updated my PHP version from cpanel to php 7.2 and then it broke something. All other blog post or pages works fine. Even custom taxonomy page also shows all custom post type on the listing page but when I am trying to visit individual custom post type, its showing error. What can I do to fix it.

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