Quite outdated. I recommend to use latest version (2.17.1 at the moment)
The given information is not enough to provide any help.
You should provide detailed step by step instructions of what you do, what you get and what you expect to get.
Please use Search before posting and read the Manual
1. This is unrelated to EmailReporting. So maybe should be moved to the appropriate forum
2. You are using the pre-build Synology app for MantisBT (https://www.synology.com/en-global/dsm/ ... s/MantisBT). If there are problems with that i suggest you contact the providers of that package here: https://forum.synology.com/enu/viewforum.php?f=190
3. Since MantisBT is just a web package. You could just remove the Synology app for MantisBT and install it manually on the Synology webserver