Thanks you a lot, you saved my day!! - It's working :-)

This one should be correct, no issue with online json viewer { "parent": { "data": [ [ 1705536000, [ { "count": 0 } ] ], [ 1705622400, [ { "count": 0 } ] ], [ 1706572800, [ { "count": 0 } ] ], [ 1706659200, [ { "count": 0 } ] ] ] } }

Sorry, here completed { "data": [ [ 0000000000, [ { "count": 0 } ] ], [ 0000000000, [ { "count": 0 } ] ] ] } this is an small part from the array. Inside data array I couldn't parse the json. Everytime a the same issue, but not that the json is invalid. The JSONDecoder says that the data is not valid if I change another part of the dict (next to data) but never says that the part is invalid json.