unable to downlaod older versions of Creative Cloud apps on mac os 10.14.6 Mojave

You can't.  Adobe expects customers to have current equipment & software no more than 2 versions back.   It's been that way for a while. Mojave is not compatible with current software.

At a minimum, you need Catalina, Big Sur, Monterey or Ventura.  And some apps won't work on Catalina.  So there's that to consider when upgrading.

If you still have previous versions installed on your system, keep using them until you can upgrade the CPU, GPU and OS to current requirements.

- https://helpx.adobe.com/creative-cloud/system-requirements.html

Hope that helps.

https://helpx.adobe.com/creative-cloud/system-requirements.html

"I'm currently trying to install the latest versions of the CC Suite on an older Mac Mini with Mac OS 10.14.6." You won't be able to. Check the system requirements.

for the current and one previous versions use the cc app:

https://helpx.adobe.com/download-install/using/install-previous-version.html#:~:text=Install%20Previous%20Versions%20of%20your%20Creative%20Cloud%20Apps,drop-down%20list%2C%20click%20Other%20Versions.%20Does...%20See%20More.

for cc 2019 and earlier use prodesigntools.com*

for everything else, you must use adobe support** (and it may take a few tries to find an agent to provide links).

*

adobe download links prior to cc 2020 are available from prodesigntools.com. https://prodesigntools.com/adobe-direct-download-links.html

follow the directions (esp, step 1)

save the install file.  it may not remain online.

thank jim @ prodesigntools.com

**