I get "Server is temporarily closed for maintenance" or "Application error" when trying to open an SSL certificate under
Top > Service Director > SSL Manager > SSL Certificates > %certificate_name%.
The article suggests that non-ASCII characters are the name of the game, however the certificate in question is free of them.
/var/log/hspcd/error_log there is the error
Out of memory! Callback called exit at ../../lib/Storable.pm (autosplit into ../../lib/auto/Storable/thaw.al) line 415.
Software issue PBAS-29636 that was fixed in OBAS release 4.5.5.
To resolve the issue, please upgrade to 4.5.5 as described in How to upgrade OBAS system to the latest available version.