If you go to Setup -> MIDI/Audio Interfaces, then see if MIDI ouput Microsoft GS Wavetable Synth is on. If it is, turn it off.
I’m not sure if that will solve it for you, but it’s something I’ve seen come up a bit, and I think that’s the error it causes.
Basically, if you’re trying to use the same sound device that is already in use, it won’t be able to use it. If you have a music player in the background, or a game, or anything else using the sound device, Podium won’t be able to initialise it.
The information thcilnnahoj asked for might help us take it further, if what I’ve said doesn’t help you.