When I log into Minecraft I get a loading error OptiFabric. I read that they answer this question and said to use bootloader 1.14.25, but it still doesn’t help me, please write what files I need to download and where I need to insert them, maybe I’m doing something wrong .

When I log into Minecraft I get a loading error OptiFabric. I read that they answer this question and said to use bootloader 1.14.25, but it still doesn’t help me, please write what files I need to download and where I need to insert them, maybe I’m doing something wrong .

First off what is the error?
What version of MC?
And what versions of these mods are you using?
Fabric Loader -
Fabric API -
Optifabric -
Optifine -