10.7 Hotfix1 breaks Webstart Workstation

Document ID : KB000093177
Last Modified Date : 27/04/2018
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After applying 10.7 Hotfix #1, webstart workstation fails with the error:  "JAR resources in JNLP file are not signed by the same certificate "
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Valid for APM 10.7 Hotfix#1 only
This is due to a regression issue DE356674

a) Solution:
Download and apply 10.7 Hotfix#3 or higher

b) Workaround:
- Stop the EM
- Restore the one jar available from  EM_HOME/hotfix/10.7.0-HF01/product/workstation/plugins to the EM_HOME/product/workstation/plugins
- Start the EM