Failure to index – dashboard.js errors

Hi,

Currently experiencing issues attempting to synchronize index with gotosolr.com.

Seeing the following error:
SyntaxError: missing ] after element list

on the following line of wpsolr-search-engine/js/dashboard.js:
timeoutHandler = setTimeout(call_solr_index_data(batch_size, data.nb_results), 100);

Finally on the front end of the site itself we are seeing the following php error:

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /..../header.php:2) in /..../wpsolr-search-engine/wpsolr_search_engine.php on line 156

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /..../header.php:2) in /..../wpsolr-search-engine/wpsolr_search_engine.php on line 156

thanks!

https://wordpress.org/plugins/wpsolr-search-engine/