Audio from my vocal tracks are weirdly absent ???

[Seafoam_Green]

PROBLEM SOLVED - it was a plugins authorization that had expired .., (sorry, i cant work out how to delete this thread?)

Guys, I'm loading up my original songs into; P.T 2021.3.1, which I recorded a few years back,
And the audio from my vocal tracks which i recorded - is strangely no longer being played in the song? (ie; i hear no audio from the vocal tracks, but i do in all the others

In troubleshooting;
- the waveform is still showing up there in the tracks
- the fader is turned up
- the output is designated to main out L/R like everything else
- nothing is being muted or soloed
- I'm not bussed out to any other tracks
- nothing seems to be out of the ordinary?

Note; this is also happening on a few different songs that I am loading up into pro tools?

Any suggestions, Guys?

PS: I've only just returned to using protools again (and computers)
after three years due to recovering from a head injury..,
- and I was quite proficient at it all before the trauma,
so please, guys; its been a hard road to climb back to where I am now and I'm still on the mend.,
so please be patient with me and keep any explanations basic and descriptive.
(Thank you kindly in advance)