There is a maven warning for org.flowable:flowable-image-generator:jar:6.0.1. Full message reads:
[DEBUG] =======================================================================
[WARNING] The POM for org.flowable:flowable-image-generator:jar:6.0.1 is invalid, transitive dependencies (if any) will not be available: 1 problem was encountered while building the effective model
[FATAL] Non-parseable POM repository\org\flowable\flowable-image-generator\6.0.1\flowable-image-generator-6.0.1.pom: start tag not allowed in epilog but got p (position: END_TAG seen …\n\n\n<p… @142:3) @ line 142, column 3
I’m not sure what caused your problem, but I have seen some messages about using different versions of Maven to generate the same jar causing similar problems. The “solution” was the same as your actions, delete the appropriate folder.