hey my issue is every time i put in a name that is in the schematics folder it says (please put the full name) but i do every time here's a screenshot to show it

idk if theres something i have to do but it does not make any sense to me

im on 1.19.3

What's the name of the schematic? If it's not a ".schematic" then ".schematic" can't work. The error message is a fixed string so the example is really just an example and not a copypasteable fixed command. In fact, it outputs that error message pretty much regardless of what went wrong.
If it is indeed a ".schematic" then I recommend using an online converter or Litematica to convert it to ".schem" or ".litematic".

What's the name of the schematic? If it's not a ".schematic" then ".schematic" can't work. The error message is a fixed string so the example is really just an example and not a copypasteable fixed command. In fact, it outputs that error message pretty much regardless of what went wrong. If it is indeed a ".schematic" then I recommend using an online converter or Litematica to convert it to ".schem" or ".litematic".

can u list a converter?

I'd have to search and blindly suggest a website I've never seen before so no. My choice would be Litematica.