Might work with wp-browser 2.

NielsdeBlaauw · NielsdeBlaauw · commit 29913ae5bbc3 · 2021-06-15T11:23:03.000+03:00
diff --git a/composer.json b/composer.json
@@ -4,7 +4,7 @@
     "type": "library",
     "license": "MIT",
     "require": {
-        "lucatume/wp-browser": "^3.0"
+        "lucatume/wp-browser": "^2|^3"
     },
     "autoload": {
         "psr-4":{
