Type Error when calling one API

[madEng84]

I have a TypeError in calling my APIs, but only in some cases (only for some APIs on Firefox and Safari)

console.log("CoreApi action-->",this.schema, action, params);
this.client.action(this.schema, action, params).then(data => {
  console.log('inside Call')
  return resolve(data)
}).catch(err => {
  console.error('[ERROR: ApiService.action()]', err)
  return reject(err.content)
})

In console i can see only

TypeError: Type error

as you can see in this attachment.
I need more info about this bug. How can i do?