Red Xs flying around while shooting the syringe gun.

[main herald]

Hello! Currently i am playing TF2 Classic and using Mid-Low Mastercomfig with some customizations (which mastercomfig app allows me to use). But i have encountered an issue: every shot of syringe gun creates a burst of red X particles which disappear after 2 seconds or so. It blinds me and makes game nearly impossible to play with comfort. What can be the cause for such an issue?
Thank you in advance!
Here's a picture of how does it look. Took it from YouTube video of a person, who encountered the same problem.

[urban osprey]

that's the default missing particle, remove any mods you have enabled besides mastercomfig and verify the integrity of tf2 (right click Team Fortress 2 in steam library > Properties > Local Files > Verify Integrity)

[random hinge]

its TF2C, no verify integrity

[urban osprey]

oh, then in that case, use the updater

didn't see the "classic" part

[main herald]

TF2C has it's own installer which can "heal" missing files. Already made that procedure, but nothing happened. I'll try once again. No mods installed, clear TF2C and mastercomfig. Thanks for the answer!

Entered in-game console and found something interesting

[urban osprey]

does this occur without mastercomfig installed?

and if it still does, try deleting cfg/config.cfg

[main herald]

No, haven't seen such an issue. Removed config.cfg before, nothing happened.

[wide rivet]

@main herald has leveled up! (0 ➜ 1)

[urban osprey]

mastercomfig isn't made for tf2 classic, so I recommend just not using it. TF2C already has a pretty good default config

and the game itself is more optimized than tf2

[main herald]

I think you are right, maybe i'll write something in a cfg file to resemble mastercomfig settings. Thanks!