求助：LEDE v2.3 想刷官改固件不成功

jiamen***

求大神帮忙，本人K3之前刷了LEDE，现在想刷成A大的官改，试了1.5,1.6，1.0等多个版本，在LEDE的WEB界面刷写固件，都出现如下信息：
/usr/lib/lua/luci/dispatcher.lua:478: Failed to execute call dispatcher target for entry '/admin/system/flashops/sysupgrade'.The called action terminated with an exception:not enough memorystack traceback:        [C]: in function 'assert'        /usr/lib/lua/luci/dispatcher.lua:478: in function 'dispatch'        /usr/lib/lua/luci/dispatcher.lua:121: in function </usr/lib/lua/luci/dispatcher.lua:120>

yadon***

进cfe刷官方固件