It seams as if the currently used Adobe Extension Manager command line utility 3.1.28 (ExManCmd) does not work with Adobe CC 2021. It fails to check the version of the installed programs, hence installing my extension always failed with error 403 (EXMAN_FAILED_NO_PRODUCT_SUPPORT_THIS_CEP).
This is the log from the extension manager on OS X (less ~/Library/Application\ Support/Adobe/Extension\ Manager\ CC/Log/EMCL.log):
02/02/21 16:38:51:510 | [ERROR] | | ExManCmd | EMCL | | | | 667968 | No products this CEP extension supports installed.
02/02/21 16:38:51:530 | [ERROR] | | ExManCmd | EMCL | | | | 667968 | Failed initial installation attempt, reinitializing product list, status = -403!
02/02/21 16:38:51:872 | [WARN] | | ExManCmd | EMCL | | | | 667968 | Failed to get version from file path "/Applications/Adobe InDesign 2021"!
02/02/21 16:38:51:872 | [WARN] | | ExManCmd | EMCL | | | | 667968 | Failed to get version from file path "/Applications/Adobe Illustrator 2021"!
02/02/21 16:38:51:872 | [WARN] | | ExManCmd | EMCL | | | | 667968 | Failed to get version from file path "/Applications/Adobe Photoshop 2021"!
02/02/21 16:38:51:884 | [ERROR] | | ExManCmd | EMCL | | | | 667968 | Product list reinitialized - about to retry install
02/02/21 16:38:51:942 | [ERROR] | | ExManCmd | EMCL | | | | 667968 | No products this CEP extension supports installed.
It seams as if the currently used Adobe Extension Manager command line utility 3.1.28 (
ExManCmd
) does not work with Adobe CC 2021. It fails to check the version of the installed programs, hence installing my extension always failed with error 403 (EXMAN_FAILED_NO_PRODUCT_SUPPORT_THIS_CEP). This is the log from the extension manager on OS X (less ~/Library/Application\ Support/Adobe/Extension\ Manager\ CC/Log/EMCL.log
):A newer version 3.1.34 is available here: https://partners.adobe.com/exchangeprogram/creativecloud/support/exman-com-line-tool.html
I was able to install my extension with this one manually.
PS: Error codes are listed here : https://community.adobe.com/t5/exchange/every-exman-command-error-code-exmancmd-error-code-list/td-p/11386103