What to do if waypoint button doesn't work

Should the waypoint button not work, go to https://flightplandatabase.com/

Go to Planner > Route Decoder. Type in the departure airport, a few waypoints from the route (only for visual purposes) and then your arrival airport.

Once you're done, click Go and zoom into the arrival airport's (EBBR) Airspace. Here you will see a lot of waypoints on the ILS of the runways. Choose the most appropriate waypoints according to the approach plate. (e.g. CF25R, CI07L, FF25R, FI22, MM25R, ML22). Once you're done, copy those waypoints in order and put them after your last waypoint in Simbrief. (e.g. BUN CF25R FF25R MM25R). For waypoints not in FPDB or Simbrief, use coordinates given in the chart (i.e OM) and convert to the decimal degrees.

After converting into decimal degrees (e.g. 50.25643,67.54392), paste it onto Skyvector. It will convert that into a waypoint.

Copy the waypoint (i.e. 505619N0043534E) into Simbrief. Go back to the original page for the remaining steps.