comments.php critical error message

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Some of our blog posts are randomly being affected and at the footer it’s saying “There has been a critical error on this website.” I enabled the Debug mode, and there seems to be an issue with the comments.php file that’s in the custom theme we use. When I rename it to ‘comments-old,php’, the blog goes back to normal. However, I don’t know if it should be kept that way. We don’t care about comments or even display them on the website. I have them disabled, but spammers still find a way to get in. See the error below. The site is running on PHP 8.3, WP 6.5.2

The theme was custom developed by another company. Please note, I’m not a developer, so please respond in a way I could understand lol. I appreciate the feedback – thanks in advance!

PS: The quick fix was duplicating the post and re-publishing it. However, that’s a lot of work. And now, WP won’t even let me change the year back to 2022.

Here’s the error:

Fatal error: Uncaught Error: Call to undefined function twentyseventeen\_get\_svg() in /home1/schnakel/public\_html/mls312/staging/wp-content/themes/High-Performance-Framework-master/comments.php:85 Stack trace: #0 /home1/schnakel/public\_html/mls312/staging/wp-includes/comment-template.php(1617): require() #1 /home1/schnakel/public\_html/mls312/staging/wp-content/themes/High-Performance-Framework-master/single.php(120): comments\_template(‘comments.php’) #2 /home1/schnakel/public\_html/mls312/staging/wp-includes/template-loader.php(106): include(‘/home1/schnakel…’) #3 /home1/schnakel/public\_html/mls312/staging/wp-blog-header.php(19): require\_once(‘/home1/schnakel…’) #4 /home1/schnakel/public\_html/mls312/staging/index.php(17): require(‘/home1/schnakel…’) #5 {main} thrown in /home1/schnakel/public\_html/mls312/staging/wp-content/themes/High-Performance-Framework-master/comments.php on line 85

I was advised to do the below, but don’t know how to. Again, I’m not a developer. However, I know how to go in and edit the code.
*Pretty simple. comments.php is trying to call a function twentyseventeen\_get\_svg() which doesn’t exist: Uncaught Error: Call to undefined function*

*You’ll probably need to contact the theme developer or, just find the part of the code in comments.php (line 88) that calls the function and comment it out.*

*Looks like that function comes with the theme twentyseventeen but yo’re not using twentyseventeen*

[this is as snippet from the code in comments.php](https://preview.redd.it/gyhspfxg31yc1.png?width=531&format=png&auto=webp&s=ea970da1f556951847f582b51ff1fd85d77958ed)

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