I will show this with an example of a simple test script.
When the command Load Url is executed, the editor freezes, and a window appears in the lower corner.
After that, such a message appears.
Here are the Load Url settings. Just loading the google homepage. Please note that the page successfully loads and displays.
I spent a couple of hours to figure out what the problem is. At first I thought it was again some kind of problem with the WHB BotChief server.
As it turned out, the browser was updated to the latest version.
This has happened recently.
How to solve a problem
Remove the browser completely through the control panel. Then download an older version of the browser.
I found an offline installer for the version 75.0.3770.80. This version works.
You can download it at this link: Download
I can not guarantee the security of this version of the application. Therefore, you can find the right version by yourself.
In these versions, automatic updates are already disabled. Disable automatic updates (see google search).