yes, that is right steps.
thanks a lot for your updated info.

No EVK in your hands, and only 6 pins in your unit, how did you backup your unit?
could share the detailed steps and your stored file? i will check.
what is your SN number of your unit? my unit SN is 1903139103, 10 figures. pls check it on side surface of housing.

yes, we have and will be uploaded.
it is in plan, and will be done soon on platformIO in VS-Code.

Great works, thank a lot for your feedback info. best wishes for you.

SN1908400135_INS_forum_1.1.2_e2_LOCK2.bin
With the whole bin, it is working now.

my email address: ekchen@aceinna.com
I will prepare whole bin for you, and get back to you later, pls send your backup bin to me, thanks a lot for your info.

it is on the surface of 300zi module, pls check again.
backup current whole EEPROM of your OpenIMU300ZI/ZA with ST-LINK, and send out BIN file by email or upload to Aceinna in forum, pls follow topic_4

it should be 10 figures, such as: 1808400528, no dash inside it.

what is the SN number of your 300ZI? it is in side surface of module, include 10 figures, such as: 1808400528 in my side.
did you download the FW precompiled bin file in ANS and try to burn by ST-Link again?

based on your description, below actions are recommend to recover and supply more info to Aceinna:

• backup whole EEPROM of your OpenIMU300ZI/ZA with ST-LINK, and send out BIN file by email or upload to Aceinna in forum, pls follow topic_4
• pls download the FW precompiled bin file in ANS and upload to unit from start address 0x08010000, topic_8
• power off unit, then restart Webserver_Win32_2.2.3.exe and your browser(Chrome), refresh browser page and try again.
• at last, pls follow the procedure in your attached link if still invalid in all above actions