Applicable to:
- Plesk Onyx for Linux
Symptoms
Test connection to Plesk from WHMCS fails:
PLESK_INFO: FAILED: Error code: 0. Error message: Unable to find appropriate manager for this version of Panel. Plesk should be at least 8.0 version
Cause
Possible reasons:
-
WHMCS uses HTTP connection instead of HTTPS to connect to Plesk API.
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The option Ability to use remote API is disabled for the reseller in Plesk.
-
The server where WHMCS is installed is not authorized to run WHMCS.
Resolution
Make sure that the following requirements are met:
-
The option Tick to use SSL Mode for Connections should be checked in WHMCS.
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When reseller credentials are used for connection, the option Ability to use remote API should be checked for this reseller at Plesk > Resellers > John Doe > Customize > Permissions tab.
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The domain should be authorized to run WHMCS. This can be checked with the WHMCS License Verification tool.
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