Influx Trial is limited to 500 frames imported and 30 seconds of audio being decoded. After this, if Influx is unlicensed, it will show a turquoise trial and generate silence sound. How to License Influx article :
https://www.autokroma.com/blog/How-to-License-Influx and after this you need to delete Premiere Pro's Media Cache (You need to go start Premiere without loading any project, go into Premiere Pro's Preferences -> Media Cache -> Delete button on top -> 2nd radio Delete all media cache files from the system)