Maintenance for the week of August 3:
• [COMPLETE] ESO Store and Account System for maintenance – August 4, 5:00AM EDT (9:00 UTC) - 4:00PM EDT (20:00 UTC)
Maybe you have it disabled in "filters" option ? When you open map there should be a "filters" menu on the right side. Check if any tick-box is disabled.
An add-on may be causing issues with your map symbols. We have two help articles linked below that go over how to uninstall or remove add-ons that you're currently using.