community 
Hello,
In CloudShell 9.1 and above we've removed the old Layer 1 drivers that came as part of the installation.
The intent wasn't to remove existing drivers during upgrade however, due to an installer issue when you upgrade the installer will remove the out of the box drivers that came with the server from prior installations.
Drivers manually added or modifed will remain unaffected.
In case you are still using those lagacy drivers (and not the new python based standard drivers) we recommned to back up the folder prior to upgrading, alternatively you can just downalod the zipped folder from our download center, Layer 1 Legacy driver folder and place it under the Cloudshell server folder until we resolve the issue in upcoming patches.
From Cloudshell 8.3 we've moved to a python based drivers and we strongly recommend to migrate any legacy driver to the new ones, the new driver can be found in the integration section at the community.
Contributors
