Hmm then perhaps it's an issue with your Adobe ID? or Browser caching. Perhaps try Incognito Mode or different browsers. Otherwise, you can raise a Daycare ticket if you have an immediate need for the files. More on Adobe ID Troubleshooting at [1]. [2] Adobe ID account sign-in troubleshooting
erics30421587 for Java11 you may download from [1]. If you need Java 8 then please log a Daycare ticket. [1] https://downloads.experiencecloud.adobe.com/content/software-distribution/en/general.html
The biggest advantage of using collections is that you can group assets dynamically, say based on search criteria. Such assets don't need to be in a specific folder (static). These might help [1] and [2][1] Managing Collections[2] A Comprehensive guide to AEM Collections
Ensure you have the correct version of Core components for the AEM release you are running [1].If you still have issues, what AEM version, core component version and exact error are you getting?[1] Core Components Versions
Try and recompile your libraries [1], if not perhaps rebuild your bundle. [1] How to force a recompilation of all Sling scripts jsps, java, and sightly in AEM 6.4