How to fixed.

1. Close SketchUp Application.
2. Press Win+R to open run dialog.
3. Type “%localappdata%\SketchUp\SketchUp 2018\SketchUp” and press enter.
4. Open file “PrivatePreferences.json” with notepad or text editor applications.
   5.Scorll down to find like this below.

Example:
“RubyWorkspace\ToolbarsUser-Bar0”: {
“BarID”: 59648
"BarName": “Artisan”
},

6. Remember number of “BarID” and Scorll up to find like this below.

Example from Step 4
"RubyWorkspace\RubyToolbar-59648" {
“Columns”: 0, <== Number of columns (0 = Default, 1 = Fix to 1 Columns, 2 = Fix to 2 Columns, etc.)
“DockBarId”: 0, <== Change Number 0 to 59419
"Visible": 0 <== Change Number 0 to 1 (0 = false, 1 = true)
},

7.Save
8.Open SketchUp
9.Move Toolbar to Docking any Position

PS: Sorry for my english language

Note: Tonight I will uploade video how to fixed it on my youtube channel (TONYWINStheCHANNEL) with thai language.

Thanks

Thanks