From your screenshot it seems that the 'Snip-Snap' plugin is playing a role there. If you would like to disable it, you just need to go to Browse > Confluence Admin > Manage Addons or plugins and find the Snip-Snap' plugin through the list. Once you find it, you just need to disable.
I hope this helps.
Do you have some customization that can be affecting the plugins layout?
To check if that's the case, go to Confluence Admin > Look and Feel and check if there's some custom code there (template and/or css) then remove it temporarily and see if the behavior persists.
This will help you to diagnose if the problem is regarding a conflict between custom code and the plugins or its a problem directly with the plugin itself.
Thanks for your suggestion. I did the same.
then I cleared the PLugin cache as instructed in
and the Left hand tree structure is missing.
Please tell me if the customizations were deleted /?
1 - current scenario
2. the correct one
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