There were some problems with leaflet in Flask-Admin After instalation Flask-Admin go
your_env\Lib\site-packages\flask_admin\contrib\geoa\fields.py
Search: self.transform_srid = self.srid
Before this add this lines: self.web_srid = self.srid
if self.srid == -1:
self.transform_srid = self.web_srid
else:
self.web_srid = self.srid
self.transform_srid = self.srid
Create copy of app/config.example.py
and rename as config.py