When fighting the rat raiders and only one remains standing, this error message can occur.
I have attached a Zheng Shi save file with the raider encounters unlocked for convenience.
Code:
Version: 0.9.048-PUBLIC-ANDROID#3209 Message: Cannot read properties of null (reading 'mf') Stack:
TypeError: Cannot read properties of null (reading 'mf')
at o.value (file:///android_asset/www/main.7caa020f.js:1:1402768)
at o.value (file:///android_asset/www/main.7caa020f.js:1:10006200)
at o.value (file:///android_asset/www/main.7caa020f.js:1:10241846)
at o.value (file:///android_asset/www/main.7caa020f.js:1:10237145)
at o.value (file:///android_asset/www/main.7caa020f.js:1:10233204)
at o.value (file:///android_asset/www/main.7caa020f.js:1:10127046)
at o.value (file:///android_asset/www/main.7caa020f.js:1:10126108)
at Object. (file:///android_asset/www/main.7caa020f.js:1:10064299)
at file:///android_asset/www/main.7caa020f.js:1:11764004
at file:///android_asset/www/main.7caa020f.js:1:10459939