Find your own local android-SDK, if you download the relevant SDK of ndk, there will be a folder called "ndk-bundle"
There is a folder called "toolchains" inside.
We noticed that there are no mips64el related files inside.
The solution is as follows:
Click here to download the NDK package separately through the browser. After unzipping, open the "toolchains" folder, compare it with the android-sdk->ndk-bundle->toolchains folder, find the missing folder, copy the past three. Recompile, the problem is solved.