Engine help

[Finster5012]

Recently taken KSP back up again with only having the Physics Range Extender, BDArmoury and North Kerbin Dynamics Renewed mods installed, gameplay was working perfectly until I dowloaded an extra mod which added a couple of Supersonic Mk3 size parts... and ever since there has been a game-breaking problem
Engines will stage but will not actually turn on
Fuel is correct, EC is sufficient, Kerbal pilots, TWR is fine, yet the communication panel shows as empty, the throttle bar will go up and engines are audibly on but produce no particles or thrust?
Deleted all the mods, verified the game files and reinstalled the game to no avail.
I've turned to the minds of the r/KerbalSpaceProgram subreddit to no avail, anyone here no any potential solutions?

Edited January 12, 2023 by Finster5012
Spelling error

[Clayel]

15 hours ago, Finster5012 said:

Recently taken KSP back up again with only having the Physics Range Extender, BDArmoury and North Kerbin Dynamics Renewed mods installed, gameplay was working perfectly until I dowloaded an extra mod which added a couple of Supersonic Mk3 size parts... and ever since there has been a game-breaking problem
Engines will stage but will not actually turn on
Fuel is correct, EC is sufficient, Kerbal pilots, TWR is fine, yet the communication panel shows as empty, the throttle bar will go up and engines are audibly on but produce no particles or thrust?
Deleted all the mods, verified the game files and reinstalled the game to no avail.
I've turned to the minds of the r/KerbalSpaceProgram subreddit to no avail, anyone here no any potential solutions?

You tried reproducing the bug with no mods installed, and it still caused the bug?

If so, I'm not sure what could be causing your issue, especially if you said that you verified your game files and reinstalled the game. If you do manage to fix your bug, make sure to make a stock backup incase this happens again.

[Finster5012]

16 hours ago, Clayel said:

You tried reproducing the bug with no mods installed, and it still caused the bug?

If so, I'm not sure what could be causing your issue, especially if you said that you verified your game files and reinstalled the game. If you do manage to fix your bug, make sure to make a stock backup incase this happens again.

Yeah I tried it again with no mods, solid fuel engines work but no variety of liquid engine works.
Tried verifying again and it claims that 8 files are missing but it doesn't replace them