Error in Landing Page at appian community edition

Certified Senior Developer

Hi folks,
i started my appian community edition after quite a while and got this error message.
Sad thing: Both elements are not accessible (not available?) via designer

on top I have no access to admin console either. The operation console provides this error. 

long story short: is that a known error?

any known fixes for this or is reaching out to the appian community support the only solution?

Kind regards, 
Richard

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