my friend cant play with me because of this mod,but I dont know how to change it.
Please help me.

Make sure you two (and the dedicated server) are using the same Spectrum config. It has settings to disable enchantments like this one.

确保你们两个（和专用服务器）使用相同的频谱配置。它具有禁用此类结界的设置。

but the spectrum he used was transmintted to him by me.why it became different.

Maybe the modpack that you used disabled the setting? The default for that setting is enabled.
You know better why files on your two's PCs are different 😄