I'm getting an error message when I upload an artifact.

I'm working on this way:

1) I click on Upload Artifact;
2) I select a file;
3) I click ok, in Upload File screen;
4) An error message appears;
5) I click on F5 and my file appears in dashboard.

The error message is:

The file could not be uploaded to the server.
hide details

ID CRRRW7230E  The server request to upload the file to the server could not be completed.

_1a is null
com.ibm.rdm.web.server.client.utils.WrapperResourceUtil.processUploadResponse@https://clm.ibilojas.com.br/rm/web/_js/?include=A~&etag=GXax8o1OtPh_en_US&_proxyURL=%2Frm&ss=Hyjr8&locale=en-us:77598:1 ._processUploadResponse@https://clm.ibilojas.com.br/rm/web/_js/?include=A~&etag=GXax8o1OtPh_en_US&_proxyURL=%2Frm&ss=Hyjr8&locale=en-us:81868:9 ._dismissDialog/_28<@https://clm.ibilojas.com.br/rm/web/_js/?include=A~&etag=GXax8o1OtPh_en_US&_proxyURL=%2Frm&ss=Hyjr8&locale=en-us:81778:1 _10.hitch/<@https://clm.ibilojas.com.br/rm/web/_js/?include=A~&etag=GXax8o1OtPh_en_US&_proxyURL=%2Frm&ss=Hyjr8&locale=en-us:450:8 ._dismissDialog/_29

Can anyone help me solve it, please?

Thank you!