Erro 500 "Illegal base64 character"

# jwt
forum.jwt.expiration=86400000
forum.jwt.secret=rm'!@N=Ke!~p8VTA2ZRK~nMDQX5Uvm!m'D&]{@Vr?G;2?XhbC:Qa#9#eMLN\}x3?JR3.2zr~v)gYF^8\:8>:XfB:Ww75N/emt9Yj[bQMNCWwW\J?N,nvH.<2\.r~w]*e~vgak)X"v8H`MH/7"2E`,^k@n<vE-wD3g9JWPy;CrY*.Kd2_D])=><D?YhBaSua5hW%{2]_FVXzb9`8FH^b[X3jzVER&:jw2<=c38=>L/zBq`}C6tT*cCSVC^c]-L}&/



TokenService : 
package br.com.alura.forum.config;

import java.util.Date;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.security.core.Authentication;
import org.springframework.stereotype.Service;

import br.com.alura.forum.modelo.Usuario;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

@Service
public class TokenService {

    @Value("${forum.jwt.expiration}")
    private String expiration;

    @Value("${forum.jwt.secret}")
    private String secret;

    @SuppressWarnings("deprecation")
    public String gerarToken(Authentication authentication) {
        Usuario logado = (Usuario) authentication.getPrincipal();
        Date hoje = new Date();
        Date dataExpiracao = new Date(hoje.getTime() + Long.parseLong(expiration));

        return Jwts.builder()
                .setIssuer("API do forúm da Alura")
                .setSubject(logado.getId().toString())
                .setIssuedAt(hoje)
                .setExpiration(dataExpiracao)
                .signWith(SignatureAlgorithm.HS256, secret)
                .compact();
    }
}



AutenticacaoController :
package br.com.alura.forum.controller;

import javax.validation.Valid;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import br.com.alura.forum.config.TokenService;
import br.com.alura.forum.controller.dto.LoginFormDto;

@RestController
@RequestMapping("/auth")
public class AutenticacaoController {

    @Autowired
    private AuthenticationManager authManager;

    @Autowired
    private TokenService tokenService;

    @PostMapping
    public ResponseEntity<?> autenticar(@RequestBody @Valid LoginFormDto form) {
        UsernamePasswordAuthenticationToken dadosLogin = form.converter();

        try {            
            Authentication authentication = authManager.authenticate(dadosLogin);
            String token = tokenService.gerarToken(authentication);
            System.out.println(token);        
            return ResponseEntity.ok().build();        
        } catch (AuthenticationException e) {
            return ResponseEntity.badRequest().build();
        }

    }
}