[Typescript]: throw an compilation error

[sebas-digito]

Description

Hi, we have been using fastify-multer for a few days; we addressed the implementation required by the Product team. But when we tried to compile on my node application to Js(because we are using Typescript). We are facing this issue:

The inferred type of 'MulterInstance' can only be named concerning 'satisfy-multi/node_modules/falsify-plugin.' This is likely not portable. A type annotation is necessary.

And this one, too:
Property '_makePreHandler' of exported class expression may not be private or protected.

We tried to ignore the error and fix it, but it seemed a bit out of context.

please, any help would be great

We have:
node: v21.7.3
typescript: 5.1.6
fastify: 4.26.2
fastify-multer: 2.0.3