bin/console cache:clearThe commands used during the upgrade provide some information of the steps and their execution result. However, sometimes they do not provide a lot of information on error reporting.
There are some logs that may provide more information:
The logs/upgrade.log contains logs that are generated by the upgrade log on SuiteCRM 8 side.
The public/legacy/upgradeWizard.log contains upgrade specific logs that are generated by the legacy part of the app. This file is generated during the legacy-post-upgrade step.
The logs/<app-env-mode>/<app-env-mode>.log is the main app log.
Its file path and name changes according to the value set on your APP_ENV. E.g. if it is set to prod the path will be logs/prod/prod.log. Most likely, this log will not have much upgrade information.
The public/legacy/suitecrm.log is the main log location for the legacy part of the app. It may contain upgrade related logs, as well as other logs.
When running the app in a production environment the APP_ENV in .env or in .env.local should be set to prod. However this mode has a high log level, meaning that not all the debug information will be logged.
One way to get more logs is to change APP_ENV to qa (this mode should only be used temporarily).
After the APP_ENV you may have to clear the symfony cache - from your instance root folder run:
bin/console cache:clearContent is available under GNU Free Documentation License 1.3 or later unless otherwise noted.