Maybe. Where are you downloading mods from? As far as I can tell from curse, the latest damage indicators mod file should be named "[1.12.2]DamageIndicatorsMod-3.4.7.jar", and yours is not. Make sure you are only downloading mods from curseforge, or from the mod developers website, and not shifty websites like 9 minecraft and the such. https://stopmodreposts.org/ has more information on which sites are bad. If you downloaded mods from any of those sites, I would delete them and redownload from curseforge.