One of our admins deleted this plugin and then tried to reinstall it by using ‘Upload a New Plugin’. But he failed. So we had to install it from the installation folder
The folder name contained within the .zip and .tgz downloads is wrong. It should be just “customBlockManager”, not “customBlockManager-ojs-3_0_1-0” (or similar). Renaming the folder within the compressed file will allow the upload. See also:
This may be something we will want to workaround in the OJS codebase rather than fixing the release packaging process.