@tig said:

It might be that SketchUp v2020 has not been installed properly ?
Try doing a 'Repair' [see below], then reinstall the LibFredo again.
Restart SketchUp and see if that has helped...

To 'Repair' SketchUp do the following...
Whilst you are logged into Windows as your normal user-account [usuario] ensure that SketchUp & Layout are both closed.
Find the SketchUp installer's exe file - usually in your Downloads folder...
Select that file's icon, right-click > context-menu > "Run as administrator"
When prompted choose "Repair".
When it completes SketchUp should run with all of its permissions set properly.

Doing a 'Repair' should not affect any of your settings or customizations...

Reinstall the LibFredo too...

Installing from an exe in any other way will cause unpredictable permission problems - like you report.
So never double-click any installer's exe file to 'Run' it.
Even if your user-account has admin powers it is not the same thing.

There have been a few reports about things suddenly going wrong - they seem to relate to a recent Windows auto-update breaking users' permissions. I know that SketchUp are investigating as it seems to permanently break some Windows users' accounts !

Report back...

Thanks Tig!
I've already repair few times sketchup as admin, and also I have reinstall sketchup few times as admin, anyway just now I've repaired again skethup... Nothing new and sitll the same error. So I'm going to report it as you say. Ah I installed the plugin by both ways including the StoreExtension

Hi Fredo6,

Thanks for the reply.

After uninstall and repair Sketchup by the way, and restart the PC, I have installed the v10.8a (then I have closed sketchup) but I have the same problem...I installed the plugin with the ExtensionStore

Error Loading File Fredo6_!LibFredo6.rb
Error: #<NameError: uninitialized constant LibFredo6>
C:/Users/usuario/AppData/Roaming/SketchUp/SketchUp 2020/SketchUp/Plugins/Fredo6_!LibFredo6.rb:65:in process' C:/Users/usuario/AppData/Roaming/SketchUp/SketchUp 2020/SketchUp/Plugins/Fredo6_!LibFredo6.rb:72:in module:LibFredo6_Loader'
C:/Users/usuario/AppData/Roaming/SketchUp/SketchUp 2020/SketchUp/Plugins/Fredo6_!LibFredo6.rb:30:in `<top (required)>'

So, could be the problem that I have the folder "users" with the name "usuarios" and the path would be broken? Just like I showed in the picture of the first comment? (attached again)

I have that problem.

Error Loading File Fredo6_!LibFredo6.rb
Error: #<NameError: uninitialized constant LibFredo6_Loader::LibFredo6>
C:/Users/usuario/AppData/Roaming/SketchUp/SketchUp 2020/SketchUp/Plugins/Fredo6_!LibFredo6.rb:65:in process' C:/Users/usuario/AppData/Roaming/SketchUp/SketchUp 2020/SketchUp/Plugins/Fredo6_!LibFredo6.rb:72:in module:LibFredo6_Loader'
C:/Users/usuario/AppData/Roaming/SketchUp/SketchUp 2020/SketchUp/Plugins/Fredo6_!LibFredo6.rb:30:in `<top (required)>'

Several times I tried to reinstall sketchup as admin and tried to repair sketchup...