The problem is your symbol library has, for some reason, not been added correctly.
So, highlight your “z_camerart_symbols” library in the last screen grab and use the rubbish bin symbol just beneath the library to delete the library.
This won’t destroy your library, it will just delete it from the list.
Next, close that page.
Next, open Schematic Editor.
Next, open symbol editor.
Next, click File/ Add library / Global / OK then up comes a page that is titled “Select Library”
Next, use the column on the left to find your library… in your case it will be D: \Main\technical etc.
Next, when you finally get to the library, double left click it.
It should now show up in the list of libraries in your symbol editor in alphabetical order… so because it starts with a z it will be at the bottom.
Next, highlight (select) your personal library in the libraries list in your first screen grab as the sign in yellow “No symbol library selected” says, then go ahead and create your symbol by clicking on the IC symbol.
Hope this helps.