Investigate TokenService test failure in PR build

[enlight]

One of the tests failed in https://github.com/loomnetwork/dashboard/pull/1453/checks?check_run_id=2636471164

 1) TokenService
       TokenService on Production Env
         Inserted address should be a member of all TokenSymbol array (Ethereum):
     TypeError: Cannot read property 'toLowerCase' of undefined
      at /home/runner/work/dashboard/dashboard/dist/webpack:/src/services/TokenService.ts:102:1
      at Array.find (<anonymous>)
      at TokenService.tokenFromAddress (dist/webpack:/src/services/TokenService.ts:102:1)
      at Context.<anonymous> (dist/webpack:/src/services/__test__/tokenService.spec.ts:80:1)
      at processImmediate (internal/timers.js:443:21)