Error after upgrading to 2.28.1 from 2.25.7

[krahe]

I have Mantis hosted on my web site which was installed via Softaculous. I have been on version 2.25.7 for some time. I would like to upgrade to a newer version, but my last two attempts failed, including an attempt to upgrade to 2.28.1 today. The error I got when trying to access Mantis after I upgraded to 2.28.1 was:

APPLICATION ERROR #400

Database connection failed. Error received from database was #0: .
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Previous non-fatal errors occurred. Page contents follow.

MySQL Native Driver (msqlnd) required

I have no idea what caused this error or what the remedy is. I'm not having any particular problems with 2.25.7, and I'm not sure there are any features in newer versions that I might be interested in. Should I just be happy with 2.25.7?

[dregad]

I don't know about Softaculous and how it's managing MantisBT installs so I'm not sure I can help. Looking at your error report:

MySQL Native Driver (msqlnd) required

Mantis 2.26.0 bundles ADOdb 5.22.6, which requires requires the MySQL Native Driver (Mysqlnd) to be installed for mysql connections.

Please make sure that it is available on your system - check with your provider.

Should I just be happy with 2.25.7?

You should definitely and always upgrade to the latest version to keep up with security updates, particularly if your MantisBT instance is exposed on the internet. There's been quite a few vulnerabilities fixed since 2.25.7, in particular a critical one in 2.28.1.