The start command uses JVM flags that no longer exist
What it looks like in your log
Unrecognized VM option 'UseConcMarkSweepGC'
What causes it
CMS and PermGen era flags were removed from Java 14+. The JVM refuses to start when it sees them.
How to fix it
Strip the CMS and PermGen era flags from the start command and use a modern G1 flag set instead.
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