Copying file failed (SOLVED)

Edit 2, solution:"
Ok, I'm not awake. Apparently I installed Unity quite some time ago (looking at the install dir). So, this thread can be closed. Installing a recent version of Unity fixed my problem, duh

Sorry if I wasted your time.

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First time user here. Sad to say I can't even get past installing Unity

After installing UnityHub (just followed the path towards the download at Start Here) to get to the installer, I install the Hub, create my project and run into errors.

At install:
- changed install location to D-drive

Then, when trying to create or open a new (2D) project:



This seems rather obvious, sinces .../Packages doesn't exist in the Resources-directory. "Het systeem kan het opgegeven bestand niet vinden" translates to File Not Found, btw.

Tried reinstalling (without reboot) so far. I'm open to suggestions while I fiddle around. Could not find any threads regarding this so far, so I hope my patience didn't get the better of me.

Edit:
Some stuff that might be relevant:

• install dir says 2018.3.14f1
• clicking on cancel will get me to Unsupported Build Target:

• • Switch Target doesn't seem to do anything. Exity Unity more or less the same
  • In the Task manager I have Unity Hub (twice) and Unity Hub 2.0.2 running after clicking Switch Target
• Win 10 64