Hi Mehtaz,
this is what I had done:
1 - cancelled cache Browser Chrome
2 - cancelled cache Joomla
3 - I checked all points from your page Troubleshooting (Problems & Solutions), and everything is as you expected.
4 - I made the first attempt to open my page builder with Chrome and it failed.
5 - I reinstalled SP Page Builder Pro
6 - I made the second attempt to open my page builder with Chrome and it failed.
7 - I made the first attempt to open my page builder with Firefox and the backend publication it' all right.
So I updated my browser Chrome ffolowing this procedure:
To update Google Chrome:
Open Chrome on your computer.
Click More. at the top right.
Click Help. About Google Chrome.
Click Update Google Chrome. Important: If you don't see this button, you've already installed the latest version.
Click Restart.
8 - I made the third attempt to open my page builder with Chrome and it failed.
I don't understand my Browser Chrome is updated!
Why it doesn't work?