Sometimes, when you dont know the answer, please avoid such statements. This has nothing to do with eMMC. From the screenshot, it is obvious that it is related to reForis frontend UI, nothing else is going on.
There could be typos or some invalid values which reForis does not accept for Wi-Fi, if it was configured by hand or in LuCI as correctly pointed out by @jklaas. What is enough is to basically reach the Technical support department as they know how to proceed with issues like these. You can see more details in the browser’s developer console. If you don’t know how or what you should be looking in the developer console, here search button might help. 
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