Problem About While Editing An Order

I coded an addon by “using pre_place_order” that saves terms in a file while the customer placing an order. But when I want to edit an order at admin, it gives blank page error when I push “save” order button. I realized that the problem is based on this line:

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$termstpl = Registry::get('view')->fetch('views/checkout/components/terms_and_conditions.tpl');<br />

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When I remove the line by getting in comment, the problem is disappering. I can edit the order.<br />
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What is wrong with this line or code?

I found that the problem is based on path on the line.

Isee the error in php file: PHP Fatal error: Uncaught → Smarty: Unable to load template tygh…