Reload greyed out in 9.2 browser GUI

[Oakley, Craig (NIH/NLM/NCBI) [C]]

After upgrading from Solr8.11.1 to Solr9.2.1, the browser GUI (at 
hostname:port/solr/#/~collections/collection_name) has the "Reload" button 
greyed out and not functional ("Add Collection" and "Delete Collection" have 
also become greyed-out, but I am not as concerned about those). This is when 
logged in as a user which can execute 
solr/admin/collections?action=RELOAD&name=collection_name using curl; but it 
would be nice to allow the browser interface to work as well. I have not found 
any clues in the request logs, nor using SolrLogAuditLoggerPlugin, nor by 
increasing logging levels for security, or in the "Major Changes" web page. Any 
ideas?