I have the same problem with the same phone. Never tampered with the KaiOS store, but suddenly it stopped loading at 99%.
Some people on the internet writes that the solution is to remove the SIM card, restart phone and store works again. But for me it didn't work.
I have a copy of all original apps made before, and tried to sideload "
kaios-plus.kaiostech.com" app (this is the correct name of Kai OS Store) via WebIDE, but got the following error: "the application
kaios-plus.kaiostech.com can't be overriden".
Anybody have any ideas?
I actually don't need the store that much, but I wanted to install Voiceping and I cannot find to download it anywhere, bananahackers store does not have it.