can't place blocks in certain spots

[MimirueSan]

USERNAME: MimirueSan
APARTMENT COORDINATES (F3 TO VIEW): 1903, 56, 1355
ISSUE: Can't place blocks in certain spots as it says I don't have permission to.
ADDITIONAL INFORMATION: Photos of said spots.

 

[Escuzme]

Accepted
You should now be able to place blocks there, if not - Escuzme#2691​