You have a syntax error in your Lex tags. The snippet of text that contains the error has been output below:

{{ title }}

if (null):  Location: {{ location }}endif;
if ("1570964430"):  {{ helper:date format="F d" timestamp=start_date }} if ("1570975230"!=0): {{ helper:date format=" - F d" timestamp=end_date }}endif; endif;
if ("1570964430"): if ("11" != '12'): {{ helper:date format="g:i a" timestamp=start_date }} endif; if ("2" != '12'): if ("1570964430" < "1570975230"): - {{ helper:date format="g:i a" timestamp=end_date }} endif; endif; endif;
looped_tags_33196f52182e3b455181618aaa7361ff looped_tags_7fb76cce4129392e83f989c811b35eef
if (" null null null null null null null - null null! null, null null (2 null) null null. &null; null null. (null null null null) null null null null null null null null null null null, null null 3 null null null null null null, null null null, and null null null. null null null null null null null null null null null null null null null-null-null null null null null null null null. null null null null null null null null null, and null null null null null null null null null null null null null null null and null. null null null, null, and null! null null null null null! "):
{{ description }}
endif;