i just typed this command.
"execute as @e[tag=catspin] at @s run tp ~ ~2 ~ ~10 ~"
just then, it show that error. and i cant open command block.
Im use Only that mod and NBT autocomplete.
What is that -_-

This appears to be caused by a corrupted commandblockide.bin file. I cannot reproduce the issue by entering the command you provided, so there must be something else going on here.

Could you please send your commandblockide.bin file so I can investigate this? It's located in your .minecraft directory.

As a workaround, you can rename this file to something else, which will cause the mod to create a new empty file that isn't corrupted. This will collapse all multi-line commands to their single-line versions.