Wappler Version : last stable 5.2.4
Operating System :MacOS 10.15.7
Server Model: Node
Database Type:none
Hosting Type: Wappler Local Server
in Wappler preview mode working, but localhost return 500 error (I used in 2 variants - with deploy to Wappler Local server and by local Docker - the same error
another thing here too. I have never run a Docker Server Type project for development then run a different Server Type project for development using Wappler Local Server in the same project. But from what you are saying the problem seems to start before you decided to run the second development as Wappler Local Server?
If you should create a brand new Wappler project just to test if you having the same problem there. Is this something you are willing to try? You can use Docker as your Server Type.