Multiple errors with Nominatim 2.5.1 installation

I just upgraded Nominatim to 2.5.1 from 2.4.0. Reverse geocoding works properly but I'm getting errors when I hit the details.php page PHP Parse error: syntax error, unexpected '[' in .../website/details.php on line 93 which keeps the page from rendering. Further, the map does not load on the search page and gives me Uncaught ReferenceError: nominatim_map_init is not defined. Both would seem like permissions errors but the permissions seem fine to access files. Further, as mentioned, reverse geocding works fine. Any help is appreciated, thanks.