Hi so recently I've been using litematica on a paper server and while pasting some of the blocks just don't paste. and it ruins the whole thing.
https://www.mediafire.com/file/9kvl6eo0jsoq98i/Ultimate_Storage_Room.litematic/file

If you have water flowing to places and blocking the paste of some blocks, then use the With non-air block replace behavior. But it looks like there are also lots of other blocks not getting pasted. Have you lowered the commandLimitPerTick value if the server rejects some of the commands when they come in too fast? And are you using the NBT restore option or not? Which MC and mod version are you using?

so i didnt lower the commandlimitpertick and i use the nbt restore option and im using fabric litematica and i play 1.19.1 paper spigot minecraft server. also i tried it in single player and it pastes just right. i dont know whats the problem with the server

Pasting in multiplayer is just much more limited because it has to work via vanilla commands and pick block hacks. Try lowering the command limit first, and also use the With non-air replace behavior to deal with the flowing water. The default 64 commands per tick is way too fast for most servers. On some strict paper/spigot servers you may even need to go as low as 1-4, although usually you just get kicked if you send commands too fast. But then again spigot also likes to randomly just drop packets, so that may be at least part of the issue...