We have frequently been getting 'bug reports' that are not valid and basically just a user needing some help with a problem. Please be aware that a bug means that an error, flaw, failure or fault in TF2Center's services that causes it to produce an incorrect or unexpected result, or to behave in unintended ways. This is a rare occurrence as we try to keep up to date with maintaining our site. Most of the time, it is NOT a bug, but just a problem the user is experiencing.
On the other hand, problems such as not being able to connect to the TF2 server/Mumble may be Valve related or your own computer. Before posting a bug report, try troubleshooting the problem yourself by restarting Steam/TF2/Computer/Mumble and validate game files. This usually fixes 90% of problems.
If you continue to request help, please use the Community Support forums located here: https://forums.tf2ce...munity-support/. We would be more than willing to provide assistance.