Install entity_route_context module.

Closes #3230561

composer.json

+{
+  "name": "drupal/linkyreplacer",
+  "description": "Converts hyperlink URL's to Linky entities, and replaces URL with Linky.",
+  "type": "drupal-module",
+  "require": {
+    "php": ">=7.3 || ^8",
+    "drupal/core": "^8.8 || ^9",
+    "drupal/entity_route_context": "^1 || ^3",
+    "drupal/linky": "^1"
+  }
+}