Here's the link to the section you needed in the training portal: https://dovetailmktg.kartra.com/portal/mgsitlogin/subcategory/122
This section will go over the most common technical problems and the most common reason and solution to fixing them.
Please reference this section before using support to troubleshoot.
If you still can't figure it out, definitely use support. Some more complicated issues may not be handled here.