any tips for dealing with "Details: The value field for the workflowaction40 (addbuttonaction) subrecord must not be ACCOUNT_SPECIFIC_VALUE." error when deploying project

You can remove the "ACCOUNT_SPECIFIC_VALUE" text from the xml definition and either leave it blank or hard-code the proper internal ID of the list/record in the target environment

You can also set it to only warn on account specific values instead of throwing an error on the deployment options