I installed updates to my Eclipse installation, and once again, it will not start. Trying to avoid the tedium of doing a fresh install and restoring all my plugins and customisations, I have been trying to research solutions. Eventually I found an SO answer that recommended starting Eclipse with -Console and -ConsoleLog. So now I have an almost 500 line log file. Searching through it, the nub of the problem seems to be loading some critical modules.

WARNING: Using incubator modules: jdk.incubator.vector
Dec 17, 2024 2:33:31 PM org.apache.aries.spifly.BaseActivator log
INFO: Registered provider org.slf4j.simple.SimpleServiceProvider of service org.slf4j.spi.SLF4JServiceProvider in bundle slf4j.simple
!SESSION 2024-12-17 14:33:23.006 -----------------------------------------------
eclipse.buildId=4.34.0.20241128-0756
java.version=21.0.3
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_AU
Framework arguments:  -product org.eclipse.epp.package.cpp.product
Command-line arguments:  -os win32 -ws win32 -arch x86_64 -product org.eclipse.epp.package.cpp.product -console -consoleLog

!ENTRY org.eclipse.cbi.targetplatform 4 0 2024-12-17 14:33:32.443
!MESSAGE FrameworkEvent ERROR
!STACK 0
org.osgi.framework.BundleException: Could not resolve module: org.eclipse.cbi.targetplatform [304]
  Unresolved requirement: Require-Bundle: org.eclipse.xtext
    -> Bundle-SymbolicName: org.eclipse.xtext; bundle-version="2.25.0.v20210301-0843"; singleton:="true"
       org.eclipse.xtext [1858]
         Unresolved requirement: Require-Bundle: org.eclipse.xtext.util; visibility:="reexport"
           -> Bundle-SymbolicName: org.eclipse.xtext.util; bundle-version="2.25.0.v20210301-0843"
              org.eclipse.xtext.util [1881]
                Unresolved requirement: Require-Bundle: com.google.guava; bundle-version="[30.1.0,31.0.0)"; visibility:="reexport"
                  -> Bundle-SymbolicName: com.google.guava; bundle-version="30.1.0.v20221112-0806"
                     com.google.guava [49]
                       Unresolved requirement: Import-Package: com.google.errorprone.annotations; version="[3.0.0,4.0.0)"; resolution:="optional"
                       Unresolved requirement: Import-Package: com.google.errorprone.annotations.concurrent; version="[3.0.0,4.0.0)"; resolution:="optional"
                       Unresolved requirement: Import-Package: javax.crypto; version="[3.0.0,4.0.0)"; resolution:="optional"
                       Unresolved requirement: Import-Package: javax.crypto.spec; version="[3.0.0,4.0.0)"; resolution:="optional"
                       Unresolved requirement: Import-Package: org.checkerframework.checker.nullness.qual; version="[3.5.0,4.0.0)"; resolution:="optional"
                Unresolved requirement: Import-Package: org.apache.log4j; version="1.2.15"
                  -> Export-Package: org.apache.log4j; bundle-symbolic-name="org.apache.log4j"; bundle-version="1.2.15.v201012070815"; version="1.2.15"
                     org.apache.log4j [248]
                       No resolution report for the bundle.                Unresolved requirement: Require-Bundle: org.eclipse.xtend.lib
                  -> Bundle-SymbolicName: org.eclipse.xtend.lib; bundle-version="2.36.0.v20240825-0714"
                     org.eclipse.xtend.lib [1848]
                       Unresolved requirement: Require-Bundle: org.eclipse.xtend.lib.macro; bundle-version="2.36.0"; visibility:="reexport"
                         -> Bundle-SymbolicName: org.eclipse.xtend.lib.macro; bundle-version="2.36.0.v20240825-0714"
                            org.eclipse.xtend.lib.macro [1849]
                              No resolution report for the bundle.         Unresolved requirement: Import-Package: org.apache.log4j; version="1.2.15"
           -> Export-Package: org.apache.log4j; bundle-symbolic-name="org.apache.log4j"; bundle-version="1.2.15.v201012070815"; version="1.2.15"
         Unresolved requirement: Require-Bundle: org.objectweb.asm; bundle-version="[9.1.0,9.2.0)"; resolution:="optional"
           -> Bundle-SymbolicName: org.objectweb.asm; bundle-version="9.1.0.v20210209-1849"
              org.objectweb.asm [2054]
                No resolution report for the bundle.         Unresolved requirement: Require-Bundle: org.eclipse.xtend.lib; resolution:="optional"
           -> Bundle-SymbolicName: org.eclipse.xtend.lib; bundle-version="2.36.0.v20240825-0714"
  Unresolved requirement: Import-Package: org.apache.log4j
    -> Export-Package: org.apache.log4j; bundle-symbolic-name="org.apache.log4j"; bundle-version="1.2.15.v201012070815"; version="1.2.15"
  Unresolved requirement: Require-Bundle: org.eclipse.xtext.util
    -> Bundle-SymbolicName: org.eclipse.xtext.util; bundle-version="2.25.0.v20210301-0843"
  Unresolved requirement: Require-Bundle: org.eclipse.xtend.lib
    -> Bundle-SymbolicName: org.eclipse.xtend.lib; bundle-version="2.36.0.v20240825-0714"
  Bundle was not resolved because of a uses constraint violation.
  org.apache.felix.resolver.reason.ReasonException: Uses constraint violation. Unable to resolve resource org.eclipse.cbi.targetplatform [osgi.identity; type="osgi.bundle"; version:Version="3.1.0.202409011232"; osgi.identity="org.eclipse.cbi.targetplatform"; singleton:="true"] because it is exposed to package 'com.google.common.util.concurrent.internal' from resources com.google.guava [osgi.identity; type="osgi.bundle"; version:Version="30.1.0.v20221112-0806"; osgi.identity="com.google.guava"] and com.google.guava.failureaccess [osgi.identity; type="osgi.bundle"; version:Version="1.0.2"; osgi.identity="com.google.guava.failureaccess"] via two dependency chains.

Chain 1:
  org.eclipse.cbi.targetplatform [osgi.identity; type="osgi.bundle"; version:Version="3.1.0.202409011232"; osgi.identity="org.eclipse.cbi.targetplatform"; singleton:="true"]
    require: (osgi.wiring.bundle=org.eclipse.xtext)
     |
    provide: osgi.wiring.bundle: org.eclipse.xtext
  com.google.guava [osgi.identity; type="osgi.bundle"; version:Version="30.1.0.v20221112-0806"; osgi.identity="com.google.guava"]

Chain 2:
  org.eclipse.cbi.targetplatform [osgi.identity; type="osgi.bundle"; version:Version="3.1.0.202409011232"; osgi.identity="org.eclipse.cbi.targetplatform"; singleton:="true"]
    require: (&(osgi.wiring.bundle=org.eclipse.xtext.xbase.lib)(bundle-version>=2.14.0))
     |
    provide: osgi.wiring.bundle; bundle-version:Version="2.37.0.v20241119-0857"; osgi.wiring.bundle="org.eclipse.xtext.xbase.lib"
  com.google.guava [osgi.identity; type="osgi.bundle"; version:Version="33.3.1.jre"; osgi.identity="com.google.guava"]
    import: (&(osgi.wiring.package=com.google.common.util.concurrent.internal)(&(version>=1.0.0)(!(version>=2.0.0))))
     |
    export: osgi.wiring.package: com.google.common.util.concurrent.internal
  com.google.guava.failureaccess [osgi.identity; type="osgi.bundle"; version:Version="1.0.2"; osgi.identity="com.google.guava.failureaccess"]
        at org.eclipse.osgi.container.Module.start(Module.java:493)
        at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel$2.run(ModuleContainer.java:2102)
        at org.eclipse.osgi.internal.framework.EquinoxContainerAdaptor$1$1.execute(EquinoxContainerAdaptor.java:143)
        at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:2093)
        at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:2033)
        at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1996)
        at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1912)
        at org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1)
        at org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
        at org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:341)

Is anyone able to explain what is going awry here, and guide me as to how to fix it, without doing a complete rebuild of Eclipse?