While we do our possible to make upgrades easy for you, when updating from previous version of SME to SME9.2 you might encounter some difficulties. Before posting in this forum or opening a bug at https:bugs.contribs.org, please have a look at the wiki page for known issues and how to workaround / fix them:
https://wiki.contribs.org/SME_Server:9.2#Known_issues_when_upgrading_from_previous_SME9.xMostly you might encounter problems if you did not update the contribs at the same time you upgrade the SME core, or if you were using templates custom that are adapted to the new release.