Login failed: Connection has failed with state "Not connected"

[TPo 0]

I have a problem with ESET server. It shows error Login failed: Connection has failed with state "Not connected" on login page. Also I made diagnostic .
The last time Eset server in browser showed error :
*version : 9.0.138.0*
*locale : en_US*
*user.agent : Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0 (gecko1_8)*
*document : https://eset./era/webconsole/184D1BF85E74D609DBF00589DCF2E826.cache.html*
*url: https://eset/era/webconsole/#id=NOTIFICATIONS:id=NOTIFICATION_WIZARD;nu=00000000-0000-0000-7016-000000000017;p=4*
        
*error: *
An uncaught exception has occurred! (com.google.gwt.core.client.JavaScriptException: (TypeError) : Ete(...) is null)
@Unknown.f_n(Unknown Source:210)@
@Unknown.i_n(Unknown Source:203)@
@Unknown.TZd(Unknown Source:232)@
@Unknown.QF(Unknown Source:250)@
@Unknown.lG(Unknown Source:412)@
@Unknown.anonymous(Unknown Source:329)@
@Unknown.jo(Unknown Source:309)@
@Unknown.mo(Unknown Source:361)@
@Unknown.anonymous(Unknown Source:78)@

Javascript cause: <br/>@TypeError: Ete(...) is null@

Any ideas where to look for a problem?

[Marcos 4,187]

Please open a support ticket for further troubleshooting. The error will need to be looked at by developers.