So I put this and Kibe together, and when I put the fluid tank beside it in order to extract xp from the furnace, it crashed.

Not only with Kibe, I also tried fluid pipes in modern Dynamics and fluid tanks in Fluid Tank, and it crashed.

here, the crash report with Kibe:https://docs.google.com/document/d/1piexJ_LepZuSAluuROc5bTO5PWdC3DPDNrnYlWwuTRQ/edit

BetterFurnaces-Fabric-1.19.2-0.2.1
Minecraft 1.19.2
Fabric Loader 0.14.17

Thanks for reporting the crash following the template.
If possible, can you make the crash report file public on Google Drive? This would make the fix even easier.

Oh, I forgot, it can be accessed now.

Thank you very much for making the crash report public, I will fix it as soon as possible.
This is not entirely linked to the transport of the xp fluid, you were probably using the Factory Upgrade with the auto input or output button active, which ended up having a problem with the fluid transporter because it did not contain an inventory of items