How to use Redmine to submit a bug report?

I followed your link to Redmine and created an account. It is not obvious to me how to submit a bug report for LibreOffice.

Since I’m not a developer, I don’t know if Redmine is the standard way of submitting bugs for LO. When I need I go through

Also, your question is not specific to writer. So, please, retag as meta.

If you refer to Reports concerning websites and web services can be added as issues on Redmine on Feedback | LibreOffice - Free Office Suite - Based on OpenOffice - Compatible with Microsoft, then you misunderstood that. The link to Redmine is for problems related to TDF services like website, this Q&A page, download page or any of the plenty developer web service tools.

Bug reports go to link at "[Create a bug report](" (links on TDF site mostly are *green* and this large text directs you to the site which @ajlittoz already mentioned in his comment).