Documents refuse to save

Wappler Version : 3.6.0
Operating System : Big Sur
Server Model:
Database Type: Mysql
Hosting Type: localhost

Open documents refuse to be saved. The output panel says
“Skip existing file routes.js”

At the moment I have no particular step to reproduce this.
It happens after switching projects a few times (between the api project and the mobile project) and previewing the mobile app in wappler multiple times. Suddenly this behaviour occurs.