Linux环境下CyberGhost VPN（版本22520）连接服务器时触发JSONDecodeError异常求助

Hey Matt, sorry to hear you're stuck with this frustrating error when trying to use CyberGhost VPN v22520 on Linux. Let's break down what's happening and walk through some fixes you can try right away.

First, here's your error traceback formatted for clearer reading:

Traceback (most recent call last):
  File "cyberghostvpn.py", line 762, in <module>
  File "cyberghostvpn.py", line 742, in main
  File "servers/traffic.py", line 180, in showInstances
  File "servers/traffic.py", line 89, in getInstances
  File "libs/services.py", line 73, in getServers
  File "libs/api.py", line 195, in doGet
  File "libs/api.py", line 291, in __doRequest
  File "requests/models.py", line 897, in json
  File "simplejson/__init__.py", line 518, in loads
  File "simplejson/decoder.py", line 370, in decode
  File "simplejson/decoder.py", line 400, in raw_decode
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[22520] Failed to execute script 'cyberghostvpn' due to unhandled exception

This error boils down to one core issue: the VPN client tried to parse a response from CyberGhost's API as JSON, but got empty content or invalid non-JSON data instead. Here are the most actionable fixes to resolve this:

• Check network connectivity to CyberGhost's API

  • First, verify your machine can reach CyberGhost's servers. Run a test command like curl -v https://api.cyberghostvpn.com and check if you get a valid JSON response. If you see HTML error pages, timeouts, or connection refusals, your network might be blocking the API.
  • Temporarily disable any firewalls, proxies, or ad-blockers to rule out them intercepting the API request.

• Clear corrupted cached data

  • CyberGhost might be holding onto old, broken config files. Locate its config directory (usually ~/.cyberghost or /var/lib/cyberghost), back up the contents, then delete the folder entirely. Restart the VPN client and try connecting again.
  • If clearing cache doesn't work, try reinstalling the client—make sure you download a fresh copy to avoid corrupted installation files.

• Re-authenticate your account

  • This error often pops up if the client fails to authenticate with CyberGhost's servers, leading to a non-JSON error response. Try re-logging in via the command line: cyberghostvpn --login, enter your credentials, then attempt to connect again.

• Enable debug logging for deeper insight

  • Start the client with debug mode turned on to see exactly what the API is returning: cyberghostvpn --debug. This will spit out detailed logs of requests and responses, which can help you spot if the issue is with connectivity, authentication, or something else entirely.

Let me know if any of these steps get you back up and running, or if you need help parsing the debug logs!

备注：内容来源于stack exchange，提问作者Matt Q