I found a solution to the issue. OptCmdSpace has always been a command for showing a "finder search window". If you now just see a window without the sidebar just do this:

• press OptCmdSpace To open this window
• Press kbd>OptCmdT or go to "view>hide toolbar".

Sometimes we just press it accidentally and this hides the toolbar, which makes this searching window into a "normal finder window".

I found a solution to the issue. OptCmdSpace has always been a command for showing a "finder search window". If you now just see a window without the sidebar just do this:

• press OptCmdSpace To open this window
• Press OptCmdT or go to "view>hide toolbar".

Sometimes we just press it accidentally and this hides the toolbar, which makes this searching window into a "normal finder window".

So I don't know why my question was deleted by nohillside. But I found a solution to the issue. option+command+space has always been a command for showing a "finder search window" if you now just see a window without the sidebar just do this. press "option+command+space" this will open this window and while being in that window press "opt.+command+t" or go to "view>hide toolbar".

Sometimes we just press it accidentally and this hides the toolbar, which makes this searching window into a "normal finder window".

I hope it helps.

I found a solution to the issue. OptCmdSpace has always been a command for showing a "finder search window". If you now just see a window without the sidebar just do this:

• press OptCmdSpace To open this window
• Press kbd>OptCmdT or go to "view>hide toolbar".

Sometimes we just press it accidentally and this hides the toolbar, which makes this searching window into a "normal finder window".