Please make this edit:
In the module's file /skin/admin/index.tpl, near line 57, find:
{$MODULE_ZONES}
<div class="form_control">
<input type="submit" name="save" value="{$LANG.common.save}" />
</div>
</form>
Change to:
{$MODULE_ZONES}
<div class="form_control">
<input type="submit" name="save" value="{$LANG.common.save}" />
</div>
<input type="hidden" name="token" value="{$SESSION_TOKEN}" />
</form>