When I paste an URL to my page, afterwards it can not be saved

When I paste an URL to my page, afterwards it can not be saved: “failed to save page - reason: bad request”. Copy-pasting or dragging URLs has this effect. When using the URL tool or choosing internal xwiki-pages it is the same. System: Windows 10, Java JDK19, xwiki 14.9 from the newest standalone zip file, Eclipse.

org.xwiki.rendering.parser.ParseException: Failed to parse input source

---- Debugging information ----
message : No converter available
type : java.util.Collections$EmptyList
converter : com.thoughtworks.xstream.converters.reflection.ReflectionConverter

I used xwicki for some time years ago. No idea what I have to do here. There was some stuff about collisions between core extensions, maybe that makes some sense to someone

2022-11-26 00:41:38,340 [main] WARN .x.e.m.i.MavenExtensionScanner - Collision between core extension [org.eclipse.jetty:jetty-util/10.0.7 (jar:file:/C:/xwiki14-9/jetty/lib/jetty-util-10.0.7.jar!/META-INF/maven/org.eclipse.jetty/jetty-util/pom.xml)] and [org.eclipse.jetty:jetty-util/9.4.49.v20220914 (file:/C:/xwiki14-9/webapps/xwiki/WEB-INF/lib/jetty-util-9.4.49.v20220914.xed)]
2022-11-26 00:41:38,341 [main] WARN .x.e.m.i.MavenExtensionScanner - [org.eclipse.jetty:jetty-util/10.0.7 (jar:file:/C:/xwiki14-9/jetty/lib/jetty-util-10.0.7.jar!/META-INF/maven/org.eclipse.jetty/jetty-util/pom.xml)] is selected
2022-11-26 00:41:38,358 [main] WARN .x.e.m.i.MavenExtensionScanner - Collision between core extension [org.eclipse.jetty:jetty-client/10.0.7 (jar:file:/C:/xwiki14-9/jetty/lib/jetty-client-10.0.7.jar!/META-INF/maven/org.eclipse.jetty/jetty-client/pom.xml)] and [org.eclipse.jetty:jetty-client/9.4.49.v20220914 (file:/C:/xwiki14-9/webapps/xwiki/WEB-INF/lib/jetty-client-9.4.49.v20220914.xed)]
2022-11-26 00:41:38,358 [main] WARN .x.e.m.i.MavenExtensionScanner - [org.eclipse.jetty:jetty-client/10.0.7 (jar:file:/C:/xwiki14-9/jetty/lib/jetty-client-10.0.7.jar!/META-INF/maven/org.eclipse.jetty/jetty-client/pom.xml)] is selected
2022-11-26 00:41:40,442 [main] WARN .x.e.m.i.MavenExtensionScanner - Collision between core extension [org.eclipse.jetty:jetty-io/10.0.7 (jar:file:/C:/xwiki14-9/jetty/lib/jetty-io-10.0.7.jar!/META-INF/maven/org.eclipse.jetty/jetty-io/pom.xml)] and [org.eclipse.jetty:jetty-io/9.4.49.v20220914 (file:/C:/xwiki14-9/webapps/xwiki/WEB-INF/lib/jetty-io-9.4.49.v20220914.xed)]
2022-11-26 00:41:40,442 [main] WARN .x.e.m.i.MavenExtensionScanner - [org.eclipse.jetty:jetty-io/10.0.7 (jar:file:/C:/xwiki14-9/jetty/lib/jetty-io-10.0.7.jar!/META-INF/maven/org.eclipse.jetty/jetty-io/pom.xml)] is selected
2022-11-26 00:41:40,511 [main] WARN .x.e.m.i.MavenExtensionScanner - Collision between core extension [org.eclipse.jetty:jetty-http/10.0.7 (jar:file:/C:/xwiki14-9/jetty/lib/jetty-http-10.0.7.jar!/META-INF/maven/org.eclipse.jetty/jetty-http/pom.xml)] and [org.eclipse.jetty:jetty-http/9.4.49.v20220914 (file:/C:/xwiki14-9/webapps/xwiki/WEB-INF/lib/jetty-http-9.4.49.v20220914.xed)]
2022-11-26 00:41:40,511 [main] WARN .x.e.m.i.MavenExtensionScanner - [org.eclipse.jetty:jetty-http/10.0.7 (jar:file:/C:/xwiki14-9/jetty/lib/jetty-http-10.0.7.jar!/META-INF/maven/org.eclipse.jetty/jetty-http/pom.xml)] is selected

Changed the registry key to go back to JDK 11:
HKEY_CLASSES_ROOT\jarfile\shell\open\command
“C:\Program Files\Java\jdk-11.0.17\bin\javaw.exe” -jar “%1” %*
Now everything works fine. My bad, should have seen the page about which Java version is supported by xwiki.

You can write a simple bat file, allowing you to switch between installed Java versions on Windows instead of editing Registry every time. One limitation is that the selected Java version will be activated while the cmd window is open.