Google some time ago switched all maps-related APIs from free to paid, which requires changes in apps that use those APIs. Because MyTrails can aggregate several similar services, I didn’t immediately realize that some functionality MyTrails relies on was no longer available.
I will be releasing an update that restores directions, POI search and location search functionality. For Pro users, I will test whether MyTrails can keep using the paid Google APIs, but for free users, MyTrails will likely have to switch to free services, such as OSM, and I may have to restrict directions.
You can restore some of the search functionality in MyTrails 2.1.4 by enabling the OpenStreetMap search provider in MyTrails > Preferences > Other.
In the latest 2.16 beta, Google search, directions and altitude are fixed.