problem with token

i think datex have problem with token

when i want check this page:
/admin/help/token

show this error:

Notice: Undefined offset: 1 in datex_tokens() (line 82 of public_html/sites/all/modules/datex/datex.tokens.inc).
Notice: Undefined index: task in entity2text_tokens() (line 54 of public_html/sites/all/modules/entity2text/entity2text.module).
EntityMalformedException: Missing bundle property on entity of type task. in entity_extract_ids() (line 7731 of public_html/includes/common.inc