@hamsalah As well as the weirdness of you having installed v1 rather than v15 [firstly, please install the latest one !], the SketchUp error message you provided shows a number of problems loading several other extensions as SketchUp starts - including those which ship with SketchUp and should be auto-copied over to your user's Plugins folder as SketchUp first runs. If SketchUp was not installed properly it can result in unexpected issues, often relating to folder/file permissions. You might sometimes muddle through unscathed, but I suspect this is the case here. Luckily it can often be fixed without uninstalling/reinstalling SketchUp or any of your extensions etc. Follow these steps. Close SketchUp. Find the SketchUp installer's exe file - usually found in your Downloads folder [if not download a new copy, or dig out your old one]. Select the exe file's icon, right-click > context-menu > Run as administrator When prompted choose 'Repair' When it's finished restart SketchUp and see if the situation improves. Double-clicking an installer's exe file to 'Run' it is not the same thing, even if your user-account has admin powers.