Fail to install Blender plugin for CC3

[Pizhlo]

I followed instructions of installation step-by-step, but when I launched Python script in CC3, I got this message in the Console Log: "
<class 'AttributeError'>, File: C:/Program Files/Reallusion/Character Creator 3/Bin64/OpenPlugin/CC3-Blender-Tools-Plugin-1_0_4/main.py, Line: 75"

What should I do to solve it?

[soupday]

Is that from the Plugins > Blender Autosetup > Import From Blender menu?

It shouldn't be crashing there at all, unless the python API in CC3 isn't fully installed properly. Which is possible, some people couldn't get the plugin to work until re-installing CC3.

[Pizhlo]

This is from Script > Load Python menu. I even don't have the 'Blender Autosetup' button.
So what should I do? Reinstall CC3?

[soupday]

Something it missing from the CC3 installation then. Re-installing might fix it.

[Pizhlo]

Thank you for your prompt answer!