There has been an error processing your request
Exception printing is disabled by default for security reasons.
Error log record number: 354086296325

To see the output from errors, lets go to path/to/magento/pub/errors/ and copy local.xml.sample to local.xml.

With this we will see the error output.

Update schema/data? php bin/magento setup:upgrade

Unable to retrieve deployment version of static files from the file system

Try to run php bin/magento setup:static-content:deploy this should to the work.

Missing CSS & JS files?

chown username: /path/to/magento/pub/ -R

Sources
http://devdocs.magento.com/guides/v2.1/install-gde/prereq/file-system-perms.html
https://magento.stackexchange.com/questions/108919/static-content-deploy-issue