Here are some ideas for issue #1, instruments don't play.

Use your computer browser to find the style you used in the song then see if the file date has been changed. For example you listed the style _BG_Band.STY. I did a search for that file and saw the file's last modified date is January 22, 2008. Obviously if the date was February 23, 2017 there is a good chance you accidentally messed up the file. You could contact PG Support and they could work with you to get a copy of the original file.

Create a new, test song. Load the style you're having trouble with and visually verify the instruments load. If they do, type a few chords into the chord sheet and regenerate. Do all the instruments play? If they do the style is okay and your BiaB settings are okay and the song file is corrupt. Sometimes it's easier to start over than to figure out how the song file is corrupt. If not then provide as much information as you can (what style, what instruments, RealTracks, midi SuperTracks, midi, etc. If midi is involved what are you DXI / VST settings? Do you have a an external sound module and so on.

Jim Fogle - 2025 BiaB (Build 1128) RB (Build 5) - Ultra+ PAK
DAWs: Cakewalk by BandLab (CbB) - Standalone: Zoom MRS-8
Laptop: i3 Win 10, 8GB ram 500GB HDD
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home