Hi, generated API key and tried traffic request:
https://api.tomtom.com/traffic/map/4/tile/flow/absolute/12/2044/1360.png?key={My_API_Key}
this results in:
Developer Inactive
Help much appreciated;)
Is the key surrounded by braces?
Yes, I checked this and tried again with same result 
May be the API key is not valid?
Many thanks
Just tried with your API key and it returns PNG tile.
I tried with curl and it worked:)
Guess something with my Firebird on Linux does not match the output format.
many thanks!