It seems that you need to mount properly the HDD, as /media/sda1 = HDD (esata HDD), or did you move some folders (including the plugins into the hdd ?)... as it looks for the openwebif into the hdd, when it should be into the flash (/usr/lib/enigma2/python/Plugins/...).

TS
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DM8000, DM800se, DM500HD, DM800HD, DM7025, DM7020s, DM7000, DM500s
VU+ Solo, VU+ Uno, VU+ Duo, Kathrein UFS910
Tivusat, TNTSat, Fransat, SSR/TSR, BBC1-2-3/ITV
DE-OpenBlackHole 1.4 image : http://www.openblackhole.com/