For studio / Robots, you need to ensure that you are using a version compatible with Orchestrator 2022.10.6 or slightly ahead of your Orchestrator version is fine as well
Robot versions from 2018.4.4 onwards and versions up to 2020.4 can communicate with Orchestrator using the Long Polling communication method. Long Polling is a communication technique where the Robot makes periodic requests to Orchestrator to check for updates.
Refer this doc for more details
TLS 1.1 / TLS 1.2 must be enabled
For compatibility and security reasons, you must ensure that TLS 1.1 and TLS 1.2 are enabled on your servers and network infrastructure to allow secure communication between Robots and Orchestrator. Older and less secure protocols like TLS 1.0 may need to be disabled.
Finally on this
these Robots are not capable of executing unattended automation processes in modern folders within Orchestrator.
you need to have Robot versions that support this feature, typically versions released after 2019.10.
How can I download the studio upgrade tool ?- UiPathStudio.msi
Or should I need to raise a request with UiPath support team for the tool? If so do I have to pay for the tool even thought I am using enterprise on-prem orchestrator?