QUIZ Import

I have been trying to import a xls file to a lesson but every time I try to do the import it appears that is creating questions from an old cached import. If I try to use the flush all caches option I get a white screen and must recover from a backup. I have tried renaming the xls to be imported, restarting apache on the server, deleting all files from TMP on the server, using different browser and even importing from a different system. Every import attempt creates a quiz from with questions that appear to be from a previous import more than 1 year ago. How can I clear everything out so I can do an import?

There are the log entries when I click on clear all caches ==> courses.socalvoa.org_access.log <== [Wed May 22 09:35:36.381326 2019] [php7:error] [pid 16282] [client 23.168.0.37:33730] PHP Fatal error: Declaration of RulesConditionalEmptyUI::form(&$form, &$form_state, $options = Array) must be compatible with RulesContainerPluginUI::form(&$form, &$form_state, $options = Array, $iterator = NULL) in /home/scvoa/domains/courses.socalvoa.org/public_html/profiles/opigno_lms/modules/contrib/rules_conditional/includes/rules_conditional.ui.inc on line 39, referer: http://courses.socalvoa.org/ ==> courses.socalvoa.org_access.log <== 23.168.0.37 - - [22/May/2019:09:35:33 -0700] "GET /admin_menu/flush-cache?token=T-z5I435GNIlYHXLO2tRpqdOVELvFrWWk2D3gG4Ovyg&destination=dashboard HTTP/1.1" 500 - "http://courses.socalvoa.org/" "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0"This is the log entry I get when I try to access the site after the clear all caches==> courses.socalvoa.org_error.log <== [Wed May 22 09:39:10.390041 2019] [php7:notice] [pid 15908] [client 23.168.0.37:35418] PHP Notice: Constant DATE_RFC7231 already defined in /home/scvoa/domains/courses.socalvoa.org/public_html/includes/bootstrap.inc on line 258