I ever used activate license, and now switch to use free version, but occurs the error

[nenya2]

License type(Free):
Activation failed with error: -4304
Error description: Error connecting to activation server. Please use offline activation.
License status: Undetermined

Device ID: R7P4egyoSMCkq4wUuYEV
Computer: PCVD000117
User Name: GuoQing Huang

[Madhavi (K)]

Did you try offline activation?

[loginerror (Maciej Kuźmicz)]

Hi @nenya2

See here:

FAQ Common license errors

Hi everyone, I’ve gathered here most of the license errors that we have encountered during Studio activation. Please feel free to complete the list by replying to this post. “Device Id already activated, trial not allowed after code activation” UPDATE: The error is resolved starting with 2019.4 version. Please get the latest Studio version. “Certificate or receipt missing” “No Error. License status: Server License Expired” Community edition needs a refresh every 12 weeks. This means tha…

@ovi

“Error connecting to activation server. Please use offline activation”

This error is due to the firewall blocking the connection between your machine and the activation server from UiPath.

[RajneeshRawat (Rajneesh Kumar)]

I am also getting firewall error. Though, I stop the firewall but its not working. What is solution of this problem?