XF 1.5 Admin menu completely blank after upgrade [RESOLVED]

[Aberidius]

So i just upgraded to the new version 1.5.4 and now my admin menu is completely blank.

www.svgaming.se/community/admin.php whats going on?

EDIT: RESOLVED!

 

[Amaury]

As a reference to others who may encounter the same issue, it would be useful to provide details on how you fixed it.