Problems after APT Upgrade

[Nutul]

ETA: The OP reported this error message 

Code:

"json.parse unexpected character at line 1 column 1 of the json data"

IIRC there is a legit back-end scenario in the genLibrary() routine where the presence of non-UTF8 characters in the song file metadata can result in json parse failing and an empty libcache_.json file.

Since I see no such message template anywhere, it looks like the response of the json.parse method directly from JQuery. This actually denotes an error in the data.