Hi Kyle,
What version of the z/OS Connect EE plugin are you trying to install?
I assume the IBM website that you referenced for downloading was https://ibm.github.io/mainframe-downloads/eclipse-tools.html
Are you familiar with the Product Versions page? https://ibm.github.io/mainframe-downloads/product-versions.html
Have you read this blog? (I realize it is a little outdated, but the concepts still hold true) https://community.ibm.com/community/user/ibmz-and-linuxone/blogs/william-alexander1/2021/05/28/ibm-explorer-for-zos-aqua-happy-5th-anniversary
Please note that IDz 14.2.x, which was based on Eclipse 4.6 and Java 6, has gone End of Support on 2022-09-30. The two versions of IDz currently in support are IDz version 15.0.x which is based on Eclipse 4.8 and Java 8, as well as IDz version 16.0.x which is based on Eclipse 4.23 and Java 11.
I suspect the version of the z/OS Connect EE plugins that you are trying to install were intended for a different level of Eclipse and Java than IDz 14.2.x.
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William (Bill) Alexander
STSM - IBM Z DevOps
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