str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in Drupal\views_templates\Plugin\ViewsDuplicateBuilderBase::replaceTemplateKeyAndValues()

I created the following patch it works like a charm for me.

patch fix

I'm closing this in favor of https://www.drupal.org/project/views_templates/issues/3321970 🐛 [PHP 8] Deprecation messages when viewing template list Fixed

That one has a merge request and is a bit more straightforward please. If you can test that and mark it RTBC I can get that in the next release.

I will credit you guys here as well either way.