解決済み
このトピックへの返信は締め切られました。
start with @jane-e's link. only if that fails should you proceed to these steps - https://helpx.adobe.com/enterprise/kb/resolve-trial-and-license-expired-errors.html
if that fails, https://helpx.adobe.com/download-install/kb/adobe-license-issues-keychain-credential-mgr.html
below are solutions some users reported:
if those all fail, change your cc language. eg, try international english - https://helpx.adobe.com/creative-cloud/kb/creative-cloud-trial-mode.html
if that fails, change the install location
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