Plot Group Forsale causes error when no Economy-Plugin is installed

[JaHollTV]

What steps will reproduce the problem?

1. Have a plot group
2. Have no Economy Plugin
3. Set the plot goup forsale with price of 0

What is the expected output?

With no economy-plugin there should be always an overwrite for the price to 0 and if the price is 0 there should be no Error.

What woul realy help is an PlotGroupSetForSaleEvent, like the PlotSetForSaleEvent. Then Servers with a custom minecraft independent economy can then send custom messages / handle custom economy.

Towny version

0.99.5.0

Server version

Paper 1.20.1

Please use Pastebin.com to link the following files

Errorlog of /plot group fs 0 https://pastebin.com/1Grn3yeu

[xCraimax]

Would be cool if this would get fixed.