Hi,
there is a bug/conflict in the Soil plugin, in the script_loader_tag filter.
With this filter is enabled, the Elementor page builder, which I use in my theme, fails to load, only when the title of the page being edited contains an apostrophe (single quote mark).
This is because the soil script_loader_tag filter replaces single quotes by double quotes in every tag, which gives the following script tag (I’ve kept only relevant code showing the issue):
<script type="text/javascript">
var elementorFrontendConfig = {"post":{"id":2583,"title":"SandBox NE PAS L"EFFACER","excerpt":""}};
</script>
The issue is in the title prop of the JSON object: the double quote before EFFACER.