Note that I do not take credit for any of the solutions posted in this thread. They were collected from all around the forums and merged into a single thread to help users resolve most common problems or answer the most common questions.
If your issue is not listed or resolved using this thread, either create a new thread in the 'Help' section (https://forum.truckersmp.com/index.php?/forum/55-help/) or contact the Support team (http://truckersmp.com/support/) for further assistance.