infinityBox BEST closed after click on flash button

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infinityBox BEST closed after click on flash button

hello. i'm using infinityBox BEST. now i want flashing device and the program closed after click on flash button. i checked virus and i uninstall again install 5 time but my problem not solve.

please help me. thank you very much

My A8 2018 A530F unlock error

Reading SN...
Android version: 7.1.1
PDA version: A530FXXU1AQL2
CSC version: A530FOXM1AQL2
Phone version: A530FXXU1AQL2
Product code: SM-A530FZKDXEF
CSC country code: France error (1)
CSC sales code: XEF

Done with Samsung Tool PRO v.33.5
HW version: REV0.3
RF cal date: 20171221
Chip name: EXYNOS7885
Modem board: SHANNON327
Security patch: 2017-12-01
Boot Warranty bit: 0
Searching server... error
could not connect to server

Done with Samsung Tool PRO v.33.5
please help