It is a pleasure to inform you that the new version of the Solr search server has been released. It is the next release from the 8.x branch and it is numbered 8.8.1.
The 8.8.1 version fixes the issue when upgrading to Solr 8.8.0 from the previous Solr version. If you plan on doing that use the newly released 8.8.1 instead of 8.8.0.
You can read the list of changes at: https://lucene.apache.org/solr/8_8_1/changes/Changes.html.
Apache Solr 8.8.1 can be downloaded from http://www.apache.org/dyn/closer.cgi/lucene/solr.