The actual pr-prepare GH action was designed and tested with forks, not having in mind the difference when the Open PR is from a fork's branch (head) to upstream plugin repo (dest).
This makes the GH action fail because updateCLI is not able to find the head branch in upstream repository. This can be solved modifying the type of workflow trigger (the ones that will be present on each plugin) from pull_request to pull_request_target and setting fork owner as updateCLI config parameter to be able to execute changes in the PR head branch.
The actual pr-prepare GH action was designed and tested with forks, not having in mind the difference when the Open PR is from a fork's branch (head) to upstream plugin repo (dest).
This makes the GH action fail because updateCLI is not able to find the head branch in upstream repository. This can be solved modifying the type of workflow trigger (the ones that will be present on each plugin) from
pull_requesttopull_request_targetand setting fork owner as updateCLI config parameter to be able to execute changes in the PR head branch.