TL-WA850RE not working after new firmware

hello, i were using tp-link wifi reapeator model TL-WA850RE, its working fine but for new option to hide ssid i search new firm and updated. after installing the new firm now the device not working even it cant configurature by any means nor it throws wifi signal. can u guys suggest what should I do

From: https://openwrt.org/toh/tp-link/tl-wa850re

Not recommended for future use with OpenWrt due to low flash/ram.
Limitations in extensibility and stability of operation are to be expected.
See 432_warning for details.

I think you should report it here: Report Devices Here With 18.06.0 Provided Image too big to save overlay