The Start/End date filter does not work anymore with plugin version 3.6.0 on Moodle 3.5.4. It did work with plugin version 3.1.1.

Example:

select username, lastlogin

from 

prefix_user

where 1=1

%%FILTER_STARTTIME:lastlogin:>=%% %%FILTER_ENDTIME:lastlogin:<=%%

Generates a correct list, but if I apply the Start / End date filter, this error occurs:

"Coding error detected, it must be fixed by a programmer: clean_param() can not process arrays, please use clean_param_array() instead."