is there something wrong with that?
yes, because the www folder is deployment ONLY, and you must never deploy into your project folder.
basically a deployment into the project folder redirects the playtest to the last deployment, and all changes you do in the editor after that cannot be tested because they are ignored by the damaged playtest.
You need to repair your project folder, and make sure to NEVER deploy into the project folder again, deployment should always go to a different output folder.
1) make a backup copy of your existing project folder somewhere else. That is so you have a backup if something goes wrong.
2) make a new project somewhere else (it can be deleted later, you need one of its files)
3) delete the www folder in the project folder
4) copy the package.json file from the new project into the project folder, overwriting the wrong one there.
If you did everything correctly, the playtest should work with the latest project version again.
test to see what your errors are now.