Warning: Invalid argument supplied for foreach() in _related_block_search() line 147 of related_block.module

Warning: Invalid argument supplied for foreach() in _related_block_search() (line 147 of /home/hoslot5/public_html/sites/all/modules/related_block/related_block.module).

Notice: Undefined index: und in _related_block_search() (line 147 of /home/hoslot5/public_html/sites/all/modules/related_block/related_block.module).

Getting these in watchdog.