Upgraded APIPotal from API Portal v3.1CR2 to API Portal v3.5.
After that login to CSM.
Open Plugin Administration Page.
Shown following error.
"FATAL: org.apache.xml.utils.WrappedRuntimeException: Could not find variable with the name of csrf-token|,|"
Can not open Plugin Administration Page.
Also, Shown same error in User Administration page.
This is fixed by 3.5CR1 or higher.
Please apply 3.5CR1 or higher.