I successfully upgraded to CiviCRM 4.7.21 (from 4.7.17), and everything seems to be working properly. However, I got a critical status error, "Performance warning: Missing indices". After reading How to find and/or fix missing indices? I tried bringing up the status screen to correct the error, but the status screen comes up empty. However, I continue to see "System Status Critical" highlighted in pink near the top of the screen. (See screenshot below.)
I downloaded the latest log from /wp-content/uploads/civicrm/ConfigAndLog, but I don't see anything relating to indices in it. (Log included below.)
Any ideas where to go from here?
Jul 09 15:58:28 [info] Running task: Cleanup old files
Jul 09 15:58:29 [info] Running task: Begin Upgrade to 4.7.18
Jul 09 15:58:30 [info] Running task: Upgrade DB to 4.7.18
Jul 09 15:58:31 [info] Running task: Update Kenyan Provinces
Jul 09 15:58:31 [info] Running task: Upgrade DB to 4.7.18: SQL
Jul 09 15:58:32 [info] Running task: Finish Upgrade DB to 4.7.18
Jul 09 15:58:33 [info] Running task: Begin Upgrade to 4.7.19
Jul 09 15:58:34 [info] Running task: Upgrade DB to 4.7.19
Jul 09 15:58:34 [info] Running task: Drop Column current_period_opening_balance From civicrm_financial_account table.
Jul 09 15:58:35 [info] Running task: Drop Column opening_balance From civicrm_financial_account table.
Jul 09 15:58:36 [info] Running task: CRM-19961 - Add domain_id column to civicrm_sms_provider
Jul 09 15:58:37 [info] Running task: CRM-19961 - Populate domain id table and perhaps add foreign key
Jul 09 15:58:37 [info] Running task: Upgrade DB to 4.7.19: SQL
Jul 09 15:58:38 [info] Running task: CRM-16633 - Add "Change Case Subject" activity
Jul 09 15:58:39 [info] Running task: Add is_public column to civicrm_custom_group
Jul 09 15:58:40 [info] Running task: Finish Upgrade DB to 4.7.19
Jul 09 15:58:41 [info] Running task: Begin Upgrade to 4.7.20
Jul 09 15:58:41 [info] Running task: Upgrade DB to 4.7.20
Jul 09 15:58:42 [info] Running task: Fix Schema on civicrm_action_schedule
Jul 09 15:58:43 [info] Running task: Upgrade DB to 4.7.20: SQL
Jul 09 15:58:44 [info] Running task: Add activity_status column to civicrm_mail_settings
Jul 09 15:58:44 [info] Running task: Finish Upgrade DB to 4.7.20
Jul 09 15:58:45 [info] Running task: Begin Upgrade to 4.7.21
Jul 09 15:58:46 [info] Running task: Upgrade DB to 4.7.21
Jul 09 15:58:47 [info] Running task: Finish Upgrade DB to 4.7.21