service binding error.. why?

 errorTypeError: The RPC receiver does not implement the method "textLableMatch".

export default {

    async fetch(request, env, ctx) {
        try {
            const lables = ['stuff', 'bla', 'box'];
            const text = 'blablablalballb!';
    
            const result = await env.WORKER_TEXT_LABLE_MATCH.textLableMatch(lables, text);
            return new Response(JSON.stringify(result));
            
        } catch (error) {
            return new Response("error" + error, { status: 500 });
        }

    },
}; 

export class LableMatch extends WorkerEntrypoint {
    async textLableMatch(lables, text) {
            console.log('Running ai mathing');
            console.log('lables:' + lables + 'text:' + text);
            const result = await this.aiMatching(lables, text);
            return result;
    }
}