From your logs I can see for example:
cmd['grep "1.1.1" "/usr/lib/gstreamer-1.0/libgstifdsrc.so" 2>&1 '] code[2], data['grep: /usr/lib/gstreamer-1.0/libgstifdsrc.so: Input/output error\n']
This mean that there is something wrong with your rootfs.
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I do not know how you have configured your rootfs in your set-top-box but is wrong. For example you use "flash expander" to put part of your rootfs on pendrive but this pendrive is going to dead or on your NAND there are to manny bad blocks.
There may be many reasons but generally this have nothing to do with plugin.
Same as you try to install some app on PC but your hard drive were you try to install is going to die.