Plugin not working

All was right & working Properly But after some days now, it works in the previous post But not working in the new post that is being written.

Here I confirm a few things.
I have stopped these plugin functions for woocommerce & activated only for post by CSS.
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.woocommerce .rtoc-mokuji-content{
display: none;
}
.woocommerce #rtoc_return.back_button_left a {
right: auto;
left: 16px;
display: none;
}

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I use Newspaper Lite by themecentury (a WordPress theme). I am facing this problem a second time. In previous time I uninstalled it & try other various Plugins But no other plugins suit me. & after trial my all plugin I re-installed it & it started to try fine again. But how this is possible I don’t know.
Now, this is the same issue again what I do?