Symptoms
Unable to access SSL/TLS Certificates page at Plesk > Domains > example.com. The following error is shown:
PLESK_ERROR: Server Error
500 TypeError
Argument 3 passed to PleskExtSslItEntityDomainComponentCheckerBaseComponentChecker::getCertificateStatus() must be an instance of PleskExtSslItCertificate, null given, called in /usr/local/psa/admin/plib/modules/sslit/library/Entity/Domain/Component/Checker/WwwComponentChecker.php on line 74
File BaseComponentChecker.php
Line 81
Cause
This is the bug with ID Â EXTSSLIT-1183. It is going to be fixed in future SSL It! extension releases.
Resolution
Follow the article to be notified when the bug is fixed – the article will be updated.
Meanwhile, apply the  workaround below:
- Log into Plesk.
- Open Subscriptions > example.com > Account(Customize) > Additional Services.
- Select “none” for SSL-It.
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