That's Izotope's Guide to Loudness for Broadcast.
If you're using the AudioBlock<>::copy() member function.
This member function has been replaced with AudioBlock<>::copyFrom().
The full change ROLI made to the AudioBlock class here: https://github.com/WeAreROLI/JUCE/commit/41055ad782bf16cd6aec0af99318524fad216fed#diff-b68fd0081c02fd681b24b0473b5eede2L315
It's a simple function name fix. Change 'copy()' to 'copyFrom()'
Pedal Playground is for designing pedalboards. This should be on the Tyrannosaurus Mouse blag.
I want to say the word "panda." Or at least write it down.