I see warnings in the log about compatibility issues within module.json:
setup.js:145
[compendium-folders] The module "compendium-folders" is using "author" which is deprecated in favor of "authors"
logPackageWarnings @ setup.js:145
setup.js:145
[compendium-folders] The module "compendium-folders" is using the old flat core compatibility fields which are deprecated in favor of the new "compatibility" object
logPackageWarnings @ setup.js:145
setup.js:145
[compendium-folders] The module "compendium-folders" is using "name" which is deprecated in favor of "id"
I see warnings in the log about compatibility issues within module.json: setup.js:145
logPackageWarnings @ setup.js:145
setup.js:145
logPackageWarnings @ setup.js:145
setup.js:145
logPackageWarnings @ setup.js:145