Set block at location to skull of a player

[iStopcontact]

Hello guys, i have a quick question.

I want to put a skull of a player on the ground to a location that will be set.

Now to test it i made this:

command /settestloc:
    trigger:
        set {testloc} to location of player

and

command /testloc:
    trigger:
        set block at location at {testloc} to head of player

but i get this error: http://prntscr.com/mxhc61

can someone help me with this?

 

[Runakai]

set block at location at {testloc} to player' skull

 

[iStopcontact]

set block at location at {testloc} to player' skull

When i use that, and reload the skript it doesnt give any errors.
But when i use the command just nothing happens

 

[Runakai]

When i use that, and reload the skript it doesnt give any errors.
But when i use the command just nothing happens

Remove the second at

 

[iStopcontact]

Remove the second at

Still the same, no errors but also nothing when i use the command
[doublepost=1552588586,1552588306][/doublepost]

Remove the second at

ah wait... i have to leave the second at in the line because now it also wont place a normal head or any other block