I just installed the editor version 0.29 and getting this error:
Access to the path 'C:\Users\myusername\AppData\Roaming\Nexion Editor\ca.ca'
I was however able to fix it.
1. Remove the software
2. Remove the Nextion folder from the roaming folder
3. Reinstall the software
Are you trying to open more than one instance of the Editor? I am having a similar error when I try to open 2 editors simultaneously.
Also you can delete ca.ca and when you start Nextion app it will work again.
ca.ca is an internal file for the Nextion Editor which should be being created in the compile and debug processes.
Downloading this file ca.ca file off the Internet does not ensure integrity of the HMI and TFT project.
What should be done is to download an HMI or a TFT and work with those files.
As far as the ca.ca file, the Nextion Editor will create as needed.
As this topic is historic it will be marked as solved.