"Failed to determine valid temporary file folder." on Linux

[polgarpeter]

When I try to start Cisco AnyConnect Secure Mobility Client version linux64-4.10.07061 in Singularity container (version 4.0.1) hosted on Red Hat Enterprise Linux release 8.6 (Ootpa), after I gave my username and password to the cli version of the AnyConnect VPN named vpn, the following error text appears in terminal:

Username: [username]
Password:
>> state: Connecting
>> notice: Establishing VPN session...
The AnyConnect Downloader is analyzing this computer. Please wait...
Initializing the AnyConnect Downloader...
Failed to determine valid temporary file folder. Contact your system administrator.
>> notice: Connection attempt has failed.
>> error: AnyConnect was not able to establish a connection to the specified secure gateway. Please try connecting again.
>> state: Disconnected

I want to know the exact location where the AnyConnect wants to determine valid temporary file folder, so maybe I can solve the problem if I know where the problematic folder is.

[marce1000]

              - Checkout https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvn06717

  M.

[polgarpeter]

Thank you for your reply, but that link provides solution for Windows not for Linux.

[marce1000]

   - I suggest you forward the issue to TAC , 

 M.

[polgarpeter]

Where can I find TAC?

[marce1000]

  - FYI : https://www.cisco.com/c/en/us/support/docs/instructions-guides/220312-open-a-tac-support-case-for-fast-dedica.html
            https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html
            https://supportassistant.cisco.com/
             

[polgarpeter]

Thank you. Unfortunately, TAC is not a viable option, since the website of the first link says: "In order to open a Cisco Technical Assistance Case (TAC), you must have a support contract or product under warranty.", and I have no support contract or product under warranty.

[marce1000]

    -  That may be a showstopper then, note that having Service Contracts for business operations is important , 

 M.