Knowledge articles not visible on Knowledge homepage or in "Search Knowledge"Description<!-- div.margin { padding: 10px 40px 40px 30px; } table.tocTable { border: 1px solid; border-color: #e0e0e0; background-color: #fff; } .title { color: #d1232b; font-weight: normal; font-size: 28px; } h1 { color: #d1232b; font-weight: normal; font-size: 21px; margin-bottom: 5px; border-bottom-width: 2px; border-bottom-style: solid; border-bottom-color: #cccccc; } h2 { color: #646464; font-weight: bold; font-size: 18px; } h3 { color: #000000; font-weight: bold; font-size: 16px; } h4 { color: #666666; font-weight: bold; font-size: 15px; } h5 { color: #000000; font-weight: bold; font-size: 13px; } h6 { color: #000000; font-weight: bold; font-size:14px; } ul, ol { margin-left: 0; list-style-position: outside; } --> Symptoms Knowledge articles are not visible on Knowledge homepage or in "Search Knowledge" and an error was shown in browser console while checking the Articles by clicking on a knowledge base on Knowledge Homepage: "search error (status 400: a valid searcher configuration was not found for this request) ". -> This error was thrown from backend Java file: SearchServiceImpl.java Release Madrid Patch 2 Cause -> This error specifically points us to some searcher configuration missing out from the Contextual search configuration. Resolution -> Verified the records in "Searchers" (cxs_searcher_config) & "Table Configurations" related to Knowledge are OOTB. -> After making sure no irregular configurations were made, Re-activated the Plugin: "Contextual Search" and performed a cache.do -> After this verified the issue was resolved i.e; customer was able to search the KB articles and get displayed in Knowledge Homepage.