Firmware update OK but Filesystem NOT

[plmicia]

I am facing difficulties to update FileSystem correctly using this library. Firmware update works well, however when I am trying to upload FileSystem I got "Update error: ERROR[4]: Not Enough Space" or 404. The same *.bin file works flawlesly with classic HTTPUpdate (non Async) and with ElegantOTA (with Async).
Could you double check? Am I missing something?
Above tests were performed in Arduino 1.8.3 and 2.3.2, with 1.2.0. and 2.0.0. library version and "simple_server" example.

[IPdotSetAF]

Hey @plmicia
Could you give me more info of your setup:
What Board, flash size, partition did you use?

[plmicia]

Sure. Board is ESP8266 D1 mini + 4MB (FS:2MB OTA:~1019KB) flash.
I have double check and in browser I am getting: "The connection was reset". ESP8266 is giving reset exception:

..IP Address: 192.168.2.147

ets Jan 8 2013,rst cause:2, boot mode:(3,6)

load 0x4010f000, len 3424, room 16
tail 0
chksum 0x2e
load 0x3fff20b8, len 40, room 8
tail 0
chksum 0x2b
csum 0x2b
v0004dc50
~ld
������o�s��g|�l��d��b�����|�s��l�o��n�l���{�l�l�����.......IP Address: 192.168.2.147

Surprisingly behaviour I am facing is inconsisient, as now I no longer get "Update error: ERROR[4]: Not Enough Space".
Filesystem I am trying to load: esp8266-FileSystem.zip